Hydraulic Dry Bag

The Rocky of dry bags. It can take a beating.

$64.95 – $99.95

20 liter20 liter
35 liter35 liter
65 liter65 liter

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.

A unisex sleeping bag with a Lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF. The same bag will also have a Comfort limit, in the realm of 32°F, so a woman would be comfortable down to an air temperature of 32ºF. These ratings require a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.

A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.


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The Hydraulic™ Dry Bag is the burliest dry bag we make and is designed for extreme conditions demanding rough and tough treatment, and offers a high abrasion resistance. Using a 600D TPU heavy duty laminated fabric with RF welded construction and featuring an oval base for ease of packing, interlocking roll-top non-wicking closure and lash loops for secure attachment means you'll be prepared for the toughest conditions any expedition or activity can throw at you. All models use our Field Repair Buckles making any necessary repairs super slick and easy whilst in the field.

Read more about which dry bag is right for you HERE



It'll survive its own solo trip down Alaskan river rapids


It can handle splashes all day, and very brief submersions

Best Use

Paddle/Water Sports, Canyoneering, Basecamp

What this bag could hold

20 liter: a larger tent canopy and footprint, general gear for a paddle trip
35 liter: general outdoor or paddle gear for a longer trip
65 liter: general paddle or overland gear for a larger group


  • 600D TPU-laminated waterproof Nylon fabric - high-performance abrasion resistant fabric
  • Non-wicking TPU roll-top closure with an innovative interlocking profile that is secure and waterproof
  • Welded construction for permanently sealed waterproof seams
  • Durable UV resistant PVC free fabric withstands cold temperatures
  • Heavy duty lash loops for secure attachment
  • Oval base to resist rolling
  • As of 2018: Features the patent-pending 1in | 25mm Field Repair Buckle with stainless steel pins