A heavy-duty roll-top dry bag made of 420D TPU-laminated nylon, with an oval base and lash points. People pick it for the boat or bike when they want a bag that holds up to rough handling.
Specs
- Fabric: 420D nylon with TPU lamination; hydrostatic head 10,000 mm
- Closure: non-wicking roll top with replaceable field-repair buckles (20 mm)
- Seams: double-stitched and tape-sealed
- Shape: oval base, white interior, low-profile grab handles, lash points
- Sizes and packed weights (Sea to Summit): 5 L 4.8 oz, 8 L 5.6 oz, 13 L 6.8 oz, 20 L 8.8 oz, 35 L 10.9 oz, 65 L 15.3 oz
- 35 L size: 12.5 x 11.1 x 23.1 in (REI)
- Coatings: non-PFAS
- Price: from $39.95 (5 L, Sea to Summit); 35 L $64.95 at REI (Oct 2026)
- Optional Dry Bag Sling sold separately (5–35 L, 2023 model or newer)
What reviewers say
Owners consistently report that it keeps gear dry in long stretches of rain. One Trailspace owner used it through eight wet wilderness days, another through an 11-day trip with nine days of rain, and a 2026 reviewer dunked a 35 L bag in a tub with no leaks. REI buyers rate it 4.8 of 5 for the thick fabric, good buckles, lash points and the oval base that doesn't roll. The knocks are that the 420D fabric is heavier than thin dry sacks, the outside gets dirty, and the loops can tear if you use it as a shoulder bag.
Good
- Tough, abrasion-resistant fabric
- Proven dry in long, wet trips
- Oval base won't roll; easy to strap down
- Buckles can be replaced in the field
Not so good
- Heavier than light dry sacks
- Not built to be carried as a sling bag without the add-on sling
- Outside shows dirt
Who it's for
Kayakers, canoeists and moto campers who need a dry bag that can take abuse on deck or a rack. Backpackers who only need a light pack liner can save weight with a thinner sack.
Sources
Last checked 2026-10-19. Specs from the maker; review notes summarized in our own words.