Fellkit
Kit builder
Menu

Sea to Summit

Sea to Summit Evac Lightweight Compression Dry Bag (20 L)

Premium Confidence: High
  • Waterproof build: 6/10 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.

Lowest price we found

£29.99 at Ultralight Outdoor Gear

In stock. Free delivery. Checked 8 Nov 2026.

RRP £45, checked 19 Oct 2026.

Go to Ultralight Outdoor Gear Compare 2 shops

Compressing a bulky synthetic or winter sleeping bag inside a rucksack and keeping it dry

Capacity
20 L
Weight
160 g
Seams
Taped
Closure
Roll top
Fabric
70 denier

Where to buy

Ultralight Outdoor Gear £29.99 In stock. Free delivery. Only the High Rise colour is offered and it is out of stock. Free UK delivery over £15.

View at shop

Sea to Summit £45 In stock. Delivery £4.50. Turkish Tile colour in stock, High Rise sold out. Free delivery over £75.

View at shop

Prices 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

From maker's figures 6/10

How well its build keeps water out, from the published seams, closure and submersion claim. 6: A bit better than average.

Double-stitched, tape-sealed seams and a hypalon roll-top, with a waterproof, air-permeable base. The body fabric has a 10,000 mm hydrostatic head, but there is no submersion claim: the 3 band.

Weight for its size

From maker's figures 5/10

How much it adds to your pack for the space it protects. 5: Does the job. Average for wild-camping gear.

160 g for 20 L is 8.0 g/L, in the 6.0–8.4 g/L band (Sea to Summit's figure; Ultralight Outdoor Gear gives the same 160 g).

In short

Good for

  • Compressing a bulky synthetic or winter sleeping bag inside a rucksack and keeping it dry
  • Trips where the pack may sit wet for days
  • Internal use: not submersible and not for hanging outside a pack

Strengths

  • Four compression straps squeeze bulky kit down evenly
  • Waterproof, air-permeable base lets air out without a purge valve
  • Sturdier recycled 70D nylon body with a 10,000 mm hydrostatic head
  • Double-stitched, tape-sealed seams and a white interior
  • Webbing handle on the oval base, and a replaceable Field Repair Buckle
  • Sizes from 5 to 35 L

Weaknesses

  • 160 g for 20 L (8.0 g/L), nearly three times the weight of a plain Ultra-Sil dry bag
  • Not submersible
  • No hands-on reviews of the current bag at 20 L were found, so durability and ease scores are missing

Sources

We haven't tested this ourselves. Every score comes from these specs, tests and reviews.

ShowHide sources (1)
  1. Sea to Summit UK: Evac Lightweight Compression Dry Bag, 20 L size table Specs, 19 Oct 2026. Used for: waterproof build, weight for its size