Flow 35L Dry Pack

Dry backpack - perfected


35 liter35 liter
Royal BlueRoyal Blue

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. Unisex sleeping bags list the Lower Limit which is the lowest temperature rating that an average male sleeper would be comfortable in.  Our women’s sleeping bags list the Comfort Limit, which is the lowest temperature rating an average female sleeper should be comfortable. The comfort and lower limit temperature ratings are listed in the features table on the product page. 

For example, a unisex sleeping bag that shows a lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF while a woman would be comfortable down to the air temperature of 30ºF, the comfort limit. Men and women should always sleep in a layer of long underwear and use a sleeping mat.

Here’s a basic categorization of appropriate use, based on temperatures:
Summer:   >+35ºF
3-Season:   +10 to +35ºF
Winter:   <10ºF

There’s a huge variety of factors that can impact sleeping bag warmth, so these ratings are not guarantees. We always recommend choosing a bag that is a few degrees colder than you plan on going out in (choosing a 23ºF bag for 27ºF nights). If you have any questions about which temperature you should select, or how to improve your warmth in a sleep system, reach out to us on our contact page any time.

Other ways to purchase

No Online Retailers Stocking Current Selection


The Flow 35L DryPack is a tough, durable and waterproof option for wet, snowy and rainy adventures. It's made of TPU laminated, 420D Nylon with fully seam sealed construction and features a white interior lining so you can find your contents with ease. The contoured back panel, removable waist belt and deep stretchy mesh exterior side pockets mean this is also an ideal choice for commuting, mountain biking, hiking and lightweight travel. 

Read more about which dry bag/pack is right for you HERE



It'll survive rough and tumble just fine, but avoid sharp rocks and blades.


It can handle splashes all day, and a very brief submersion.

Best Use

Day Hikes, Bike Commuting, Paddle Sports


  • Waterproof, abrasion resistant, TPU laminated 420D Nylon fabric
  • Top-loading roll-top main chamber
  • Fully seam sealed construction
  • White interior for improved visibility of contents
  • Side compression straps with hook-release buckles
  • Durable tabs on rear of pack for bungee/accessory cord attachment
  • Internal zippered stretch fabric pocket for small items
  • Ergonomic integral back panel
  • Ventilating, perforated shoulder straps
  • Removable padded waist belt
  • Large top handle for comfortable lifting
  • Easy access hydration compartment