Sea to Summit
Sea to Summit Lightweight Dry Bag (8 L)
- Waterproof build: 5/10 How well its build keeps water out, from the published seams, closure and submersion claim.
- Weight for its size: 5/10 How much it adds to your pack for the space it protects.
Keeping clothes, electronics or a first aid kit dry inside a rucksack
- Capacity
- 8 L
- Weight
- 67 g
- Seams
- Taped
- Closure
- Roll top
- Fabric
- 70 denier
Where to buy
Tamarack Outdoors £14.40 In stock. Delivery £3.49. Beluga, Burnt Olive, Surf The Web and Spicy Orange in stock, Sulphur out of stock. Free delivery over £50.
View at shop: Tamarack OutdoorsSea to Summit £18 In stock. Delivery £4.50. 8 L in stock except Spicy Orange. Free delivery over £75.
View at shop: Sea to SummitPrices checked 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Waterproof build
Estimate from maker's specs: seams, closure and water rating 5/10How well its build keeps water out, from the published seams, closure and submersion claim. 5: Does the job. Average for wild-camping gear.
Estimate from maker's specs
Weight for its size
From maker's figures 5/10How much it adds to your pack for the space it protects. 5: Does the job. Average for wild-camping gear.
67 g for 8 L is 8.4 g/L, in the 6.0–8.4 g/L band (Sea to Summit's figure; Ultralight Outdoor Gear lists 61 g, 7.6 g/L, the same band).
What reviewers say (out of 10)
Ratings marked * are from reviews and are not part of the trip score. They are reviewers' scores, not our own measurements. How we score
Durability*
Reviewers' average 7/10How well the fabric and seams resist scuffs and holes.
4 reviews on durability, e.g. "I’ve been struck by how little wear the Sea to Summit Lightweight Dry Bag has shown, after nearly a year’s continual usage.".
Reviewers disagree on this.
Ease of use*
Estimate: only 2 reviews about ease of use (fewer than the 3 we need, so never above 8) 8/10How easily it closes, seals and packs.
2 reviews on ease of use, e.g. "It’s easy to deploy even with thick winter gloves on – a bonus if you’re using dry bags in all weather.".
In short
Good for
- Keeping clothes, electronics or a first aid kit dry inside a rucksack
- Everyday organising of mid-size kit at a modest weight: 67 g for 8 L
- Splash and rain protection inside a pack; Sea to Summit says not to submerge it
Strengths
- Recycled 70D nylon
- Hypalon roll-top with a replaceable Field Repair Buckle
- D-ring for clipping on
- Sizes from 1.5 to 35 L
- Oval base stops it rolling away on slopes; white interior makes small items easy to find
Weaknesses
- Needs at least three rolls of the roll-top before buckling to seal
- Not made for submersion: Sea to Summit says water can seep through the roll-top
- Sea to Summit advises double-bagging electronics and avoiding sharp or abrasive surfaces
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.
ShowHide sources (7)
- Sea to Summit UK: Lightweight Dry Bag, 8 L size table
- Tamarack Outdoors: Sea to Summit Lightweight Dry Bag (taped seams)
- Advnture: Sea to Summit Lightweight Dry Bag review (5 L, nearly a year of use)
- Live for the Outdoors: Best dry bags (Sea to Summit Lightweight Dry Bag Set, 20/13/8 L)
- Treeline Review: Best Dry Bags of 2026 (Sea to Summit Lightweight Dry Bags)
- OutdoorGearLab: The Best Dry Bags (Sea to Summit Lightweight, 5 L tested)
- Vertical Life: Sea to Summit Dry Bags review (Lightweight 3/5/8/13 L, Ultra-Sil and Big River too)