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Inventing a new sport

Seatrekking means adventure. Previous to setting off, a route, which is to be covered snorkeling and freediving within several days, is determined. Equipped with a waterproof and floatable backpack, the seatrekkers travel along the coastlines, exploring and discovering nature - below the water surface as well as above. The nights are spent ashore on the beach beneath the stars.

»To escape the overload of everyday life's materialism, we were looking for a way to feel what's essential again - the simplicity of life within nature.«

Our story

Seacost Explorers

Becoming part of a story 

In 2005 a group of young people joined forces and started to fulfill their dream. They added to the usual trekking trails ashore a number of sea trails along the shores that had yet to be discovered.

During their travels to our planet's oceans they developed the waterproof luggage to suit the requirements of their activities. Over the years a small but unique line of products emerged. Now these products have been made available to other seatrekkers and water sports enthusiasts.

»As we trek along the coast, we spend most of the time in the water. We take only what's essential with us in our waterproof backpacks. We swim, snorkel, dive, heading for the most beautiful beaches and remote bays, we rest on cliffs or in shady cool caves, we dive down to the bottom of the sea and we sleep beneath the stars. A feeling of utter freedom and nativeness.«

TRanslate Abenteuer

Adventurous Coast

Discovering places untouched

Round about two thirds of the earth are covered by water. The oceans and coasts are certainly amongst the most magnificent scapes our planet has to boast. They have always wielded a unique power and are subject to the greatest fascination. Seatrekking adds a dimension to the existing possibilities of exploration by a great number of fascinating under water trails. Especially appealing to seatrekkers are countless worlds of islands with their specific ecosystems below and above the water as well as their versatile cultures.

The seatrekker takes responsibility for the grounds he treads on. His equipment and provisions are selected in order to not leave a trace behind. Only then the original philosophy from which seatrekking emerged, is honored.

»Beaches and oceans can only be jewels when they are clean and unspoiled by human waste. As a seatrekker you learn that very quickly.«

Translate reduktion

Utter Reduction

Traveling minimalistically

Those who travel with little luggage remain flexible and spontaneous, just like the sea. Unnecessary ballast is not packed in the first place. This reduction to the essentials can lead to rich experiences.

The equipment for seatrekking consists of snorkeling or apnoe gear with a wetsuit, snorkel, goggles and long (and thus effort-saving) fins. Provisions, sleepingbag and other equipment are stored in an ÁETEM Big Pack or an ÁETEM Sea Shell.

Reduction of luggage and the ability to move about ashore and afloat make seatrekking one of the easiest and most independent ways of traveling in accordance with nature.

 »The most important instrument is the body itself. Your awareness and sensibilities are raised hugely when you expose yourself to such a force of nature - the sea.«

a float an a shore

Afloat and ashore

Discovering land and sea trails

Seatrekking combines trekking ashore with exciting underwater trips. Wherever the scuba diver or canoeist is limited due to their equipment, a seatrekker is free to explore ashore: an expedition to the coast or further inland to find a place to sleep. Tours can be planned individually according to preferences and the conditions of terrain and weather - for those who like to be challenged as well as those who fancy a moderate tour with a small group.

»You get to places that you couldn't reach by boat - places that are completely natural and untouched. When you climb a hill or a cliff there and see the ocean lying at your feet - that's freedom.«

Follow your instinct

Follow your instinct

Low-tech instead of high-tech 

No complicated technical equipment is needed for seatrekking. What really counts is instinct and perseverance. Freed of technology and consumerism one's own senses are quickly discovered, trained and then trusted.

Still, especially beginners should be aware of the risks of apnoe diving. A realistic self-assessment regarding diving, swimming long distance and trekking in unsecured terrain is crucial. 

»Freediving contains another aspect: holding your breath. This moment of pause calms the whole organism. It frees you of a lot of baggage that you drag around in everyday life.«

 »Seatrekking is an individual sport, since the sea is such a big challenge, which you have to assess yourself according to your abilities. You will quickly learn who you really are and what you can or can't do.«


Sea Shell "Charles D."

Sea-shaped Hardcase

65 l Volume. Built to brave the force of the ocean`s nature and for traveling the trails of their shores.

Sea Shell "Charles D."

Form is Function

Sea Shell, by means of its hard, carbon shell, keeps whatever is in it from getting wet or damp and protects it from physical impact. The empty weight varies depending on rigidity and durability between 3.5 and 7 kg. Its volume (65 l) and streamlined shape combine to become a piece of water sport gear with completely new qualities.

Sea Shell "Charles D."

Multiple chamber system

Sea Shell Charles D. has two waterdry chambers sealed with stable screw caps.

Sea Shell "Charles D."


When floating in the water, Sea Shell follows the Seatrekker on the leash unresistantly due to its elaborate aquadynamic. The Sea Shell can be used as a bodyboard, a function that is especially useful for Seatrekking beginners and on offshore trails.

Sea Shell "Charles D."


Caps, fins, anchor system, telescope diving flag and harness are especially developped and optimized for the purpose of Seatrekking.

Costum handmade.

James C.

Big Pack "James C."

High End Seatrekking Pack

Extreme - compact & robust

Ashore or afloat, James C. is a reliable companion, ideal for versatile routes. Designed for tours lasting several days, Big Pack provides a capacity of 50 to 70 l.

Big Pack "James C."

High End Seatrekking Pack


A gas- and waterproof outer shell provides protection from dampness and physical impact. In the water James C. gets pulled along on a leash. An attachable diving flag tells approaching watercraft to keep their distance.

Big Pack "James C."

High End Seatrekking Pack

Inherently stable

The gauge pressure system makes James C. inherently stable – the outer surface is smoothed by the inner pressure. This immensely reduces the drag while floating in the water. The stiffened shape increases the wearing comfort while at the same time cushioning the content. The Big Pack can be inflated quickly by means of a valve; the high quality circumferential gasproof zip keeps out dampness 100% even on longer lasting journeys.



Big Pack "James C."

High End Seatrekking Pack


Ashore, Big Pack is worn like a backback. The comfortable harness has two ergonomically shaped shoulder straps and a cushioned strap that goes around the waist. The harness is easily detached for tours in the water.

The wearing comfort, which depends on the stiffness of the pack can be regulated by altering the inner pressure. It is thus individually adjusted to match requirements of the route and the wearer.



Big Pack "James C."

High End Seatrekking Pack

Multi-chamber system

dry stays dry

An adjustable membrane seperates two chambers. Wet items can therefore be kept away from dry ones. Both chambers are water- and gasproof.


Big Pack "James C."

High End Seatrekking Pack


•    robust, tear-resistant outer material,
     100% waterproof
•    capacity of 50 to 70 l
•    2 water- and gasproof chambers;
     separated by an adjustable membrane
•    high performance load-bearing system with
     valve and circumferential gas- & waterproof zip
•    high quality harness with waist strap
•    signalling whistle
•    repair kit, grease for the zipper

Further components
(not included)

•    elastic leash, 7 m
•    attachable diving flag

Big Pack: EUR 890.00
(VAT included + shipping & tax)
Pre-Order now!

Falcon S.

Day Pack "Falcon S."

Survival Pack for day trips

Your constant companion

Falcon S. provides similar functions to its bigger siblings. With its capacity of 35 liters divided into two chambers, it is suitable for day trips or can be used as a city bag. For water sport enthusiasts it is a compact solution to transport supplies. When anchoring behind the swell, Day Pack can serve as the home base when out surfing, especially when the beach is hard to reach in wavy conditions.


Day Pack "Falcon S."

Survival Pack for day trips


Falcon S. is pulled along on a leash. It has an adaptive anchoring system, which keeps it in one place even in a current or wavy conditions. Its patent-registered gauge pressure system along with a PU-hard shell combines aquadynamics with extreme durability. Quickly inflated by means of a valve, its two circumferential gasproof zips keep out dampness 100% even on longer lasting journeys.


Day Pack "Falcon S."

Survival Pack for day trips


Day Pack is very robust and protects of the luggage content. The stable shape of the PU-hard shell serves as perfect wearing comfort. The harness of Day Pack Falcon S. consists of two ergonomically formed shoulder straps and a cushioned waist strap.



Day Pack "Falcon S."

Survival Pack for day trips


•    robust, tear-resistant outer material
      100% waterproof, integrated PU hard shell
•    capacity of ca. 35 l
•    2 water- and gasproof chambers
      seperated by an adjustable membrane
•    2 circumferential gas- & waterproof zips
•    patent-registered gauge pressure system providing
      inherent stability and reduction of drag afloat
•    3 m leash
•    attachable diving flag
•    high quality harness with shoulder and waist strap
•    signal arrows
•    repair kit + glue

Optional components
•    adaptive anchoring system
•    3 m leash



Seatrekking trails, offers and travel reports

Travel Report for downloading

Here you will find a list of seatrekking tours put together by the founders of ÁETEM. You can download the PDF on your hard disc. Each trail description contains interesting information regarding the day tours, maps, pictures etc. Nonetheless we recommend to plan each trip individually and thoroughly. You are welcome to send us your own travel report. Just email us.

For those who prefer to join a guided group: we will soon publish offers for trails and seatrekking courses here and on our platform

CRES, Croatia

Starting point: Valun

Space of time: 4 days 

Afloat: 3 days
Ashore: 1 day
Level: easy

Download PDF

ELBA, Italy

coming soon


coming soon

KHO TAO & KHO LIPE, Thailand

coming soon

Watch the Sea

Watch the Sea

Protecting an essential habitat

Only within an intact and biologically active environment can Seatrekking be a rewarding adventure. Every single plastic bottle, carelessly chucked away, takes away all magic from a pristine bay. Anchors ploughing the sea ground and harpoon hunting damage this rich environment and make it desolate - not to mention industrial fishing and pollution. It is all the more important to protect what's still there, not leave behind trash and use our resources wisely.

This sport allows a holistic view of a maritime region. Seatrekkers do not only experience one single aspect of our ecosystem for a few hours but the whole of it while covering many kilometers. This approach creates a deep understanding for the maritime environment, its uniqueness and fragility.

The result of this is a commitment to the protection of the oceans. It is derived from the simple desire to not expose this environment to our voracious greed.


Platform for communication and information

"Watch the Sea" is our vision of bringing together people committed to protecting the sea by providing a platform of communication. Here, for example, impressions of the state of the coasts can be exchanged and information about possibilities to support the establishment of new marine reserves can be found. The development and designation of marine reserves is an important topic about which we will keep you posted here. 

»While seatrekking we learn to recognize the sea as a habitat. As our habitat, that is crucial for the future of all of us. «


Frequently Asked Questions

  • What is seatrekking?

Seatrekking combines individual traveling and water sports. We travel and discover natural and wild costal terrain by skin- and free diving. To reach a maximum of freedom and unrestricted movement above and under water, we travel with reduced load.Our trails along the coastlines and across islands and archipelagos are individually planned, covering longer distances both hiking / backpacking and skin-diving.With long apnea fins we cover up to 6 km (4 miles) a day and dive into the depths - according to personal preferences and skills up to 20 meters deep. Seatrekking covers a huge power spectrum, varying from relaxed snorkeling to extreme sportive challenges.


  • Why do I need an ÁETEM backpack?

Seatrekking is a combination of backpacking, free diving and fin-swimming. The ÁETEM Bigpack is a piece of sports equipment that, carried over land, works as a top-quality conventional backpack. Completely waterproof and with an inflatable main compartment it floats on the water surface even when fully loaded. With a long and flexible leash it is attached to the ankle of the seatrekker. Thanks to its hydrodynamical shape it is very easily pulled across the water.


  • What does a seatrekking tour look like? How does it work?

Seatrekking is an individual sport. The routes are tackled according to personal skills and interests. There is a broad range from traveling for several weeks along a shoreline or from spot to spot, to short diving trips for a day or two. Generally we advise everyone to plan the routes carefully and to look into the given facts and conditions on-site. Amongst others you will have to deal with weather conditions, potentially dangerous currents, wildlife, ... - in the end it is quite similar to planning a surf-trip to an unknown region.

Because of the potential sources of danger it is generally a good idea to go in pairs or smaller groups and never swim through unknown waters by yourself. Apnea or free diving is an essential part of our sport, so you will need some practice and knowledge in this field, too.


  • What is the seatrekker's attitude? What do I have to pay attention for?

When traveling through sensitive ecosystems like we do it is an absolute given to not leave any traces behind and for sure no waste or drop-offs. It is most important to preserve and protect the natural ecological balance. So no beach parties! Rather the first diving sessions at sunrise.


  • Does seatrekking work in bigger groups as well?

As with hiking or backpacking, bigger groups with more than say five people cause higher efforts in planning and coordination. Who is the weakest member of the group that determines speed and complexity? Where to set up camps for the night? Who is in charge for water and food supply?Generally there is no such thing as a maximum number of seatrekkers in a group. But from experience we can tell that this sport works much better with smaller groups, and is thus more fun, not last because there is more time to discover what the journey has to offer.


  • Where can I book a seatrekking course?

Soon you will be able to book trails and courses on our website. Simply sign up for our newsletter and we will keep you informe:


  • What physical skills do I need to go seatrekking?

Similar to surfing or mountaineering you need a healthy physical fitness. The daily distances and the traveling speed are up to you. Especially for beginners it is most important to learn the theoretical and practical fundamentals of free diving before traveling the ocean and, even more, to know and to accept your limits.


  • Does the luggage interfere when swimming / diving?

The ÁETEM packs have a special valve to inflate. The pressurized backpack floats on the water surface without sinking. It even could be used as a safety buoy. The leash, being the bond between you and the backpack, is extremely elastic so that the small effort necessary to pull the luggage is spread evenly. With a length of up to 10 meters it allows most dives. When you want to go deeper you can easily anchor the backpack to the sea ground.


  • What to keep in mind when packing?

As the laws of physics say, the most heavy part of the backpack will always point downwards when swimming on the water surface. That's why you should spread heavy things evenly and rather put them away from the carrying system which is to point to the sky. Then the backpack floats with the plain face down minimizing drag. When carrying the pack ashore the center of gravity should lie as usual close to the back and hips.


  • What areas are best for seatrekking?

You can go seatrekking in lots of places, from Thailand and the Caribbean to the fjords of Norway or the Mediterranean Sea. But keep in mind that especially for colder regions you will need proper equipment (e.g. wetsuit). Cliff lines are often more species-rich and more interesting for diving than flat and sandy grounds. But there needs to be a sufficient number of bays or other accessible coastlines where you can set up a camp or leave the water when necessary. Marine bio-regions usually offer the best views on versatile sea-life. But before you go always make sure that is allowed for swimmers and free divers to access these areas.


  • Where can I learn free diving?

Apnea- or free diving means diving by one's own tidal volume, without extra oxygen. This makes the basic principle of seatrekking. Nowadays many scuba diving centers also offer apnea lessons. For additional information visit


  • Why do I need free diving fins?

These types of fins are especially long and flexible. Their shape and character allows to generate speed not only when pushing down but also on the upward movement, a feature you won't find in scuba fins. Thereby you can lower your effort and swim for a longer period of time. On the downside  of free diving fins is that they may cause pain in your ankles and foot muscles, especially if your untrained or have a wrong technique. So you better start with shorter routes or go practice at you nearby lake.


  • When can I buy ÁETEM products?

Sales for the ÁETEM Bigpack are planned to start in 2014 in a limited series. If you want to have one too, please sign up for our newsletter - we will keep you up to date.

The carbon fibre hardshell ÁETEM Sea Shell is a custom-made product. For now we only produce single items on advance order. We are happy to take your request via email. (prices start from 2.200 €)

The ÁETEM Daypack (ca. 35 l, waterproof, floatable small-sized backpack) just entered the development phase. We will keep you informed.




General inquiries

Press & Media
Martina Schlüter





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Dieselstraße 6
82291 Mammendorf

Responsible persons
Bernhard Wache, Peter Habich

Telephone  + 49 (0)8145 997130
E-mail    info(at)

Register entry
Entry in Handelsregister
Register Number   HRB 209892
Register Court   Amtsgericht Munich

Copyright Photos
ÁETEM, Munich 2015


Martina Schlüter
(Sardegna, Elba, Mallorca)
Cedric Schanze (Elba)
Bernhard Wache (Thailand, Kroatia)
Daniel Samer (Products)
Julia Schweizer (Thailand)

Concept & Graphics

Unikat, M. Schlüter

Loitfelder & Weikamp


mindscreen GmbH




Many thanks to

Kazim Acikgöz von Lackierbar, Walter Boehm und Helmut Unger von J&V Technik, Peter Habich und Marina Lugmeier von h-m-gmbh, Cedric Schanze, Leo Feuchtenberger, Berti Fischer, Sven Bender, Daniel Samer, Bara Bröst, Sophie von Blücher, James Miller, Horst Heilmaier & Michaela von Heilmaier Modellbau, Lutz Keydel, Fabian Kleiner, Michi Peßl, Joseph Schmith-Klingenberg, David Wasielewski, Amber Denton, Sabrina Niederle, Eddie, Max Goldschmidt, Jakob Klotz.