Evac Lightweight Compression Dry Bag

The Sea to Summit Evac Lightweight Compression Dry Bag is a roll-top dry bag and a compression sack in one. Stuff a sleeping bag in, roll the top, pull the four straps, and the air leaves through the Evac base while the water stays outside. The body is 70D recycled nylon with a 10,000 mm hydrostatic head, tough enough to ride on a bike or in a kayak hatch.

What it keeps dry, and how dry

The main fabric is polyurethane-coated 70D nylon rated to 10,000 mm hydrostatic head, and the seams are double-stitched then tape-sealed. The base is Evac fabric, a waterproof laminate that lets air through, so you squeeze the bag down without a purge valve to fiddle with or forget to close. A hypalon roll-top stops water wicking along the fold.

That handles a day of rain on the back of a bike, spray and bilge water in a kayak, and a soaked pack on the Western Arthurs. It is a roll-top, so keep it out of full submersion: strap it on deck or stow it in a hatch.

Capacity and what fits

• 5 L (98 g): a down jacket, or a summer quilt.
• 8 L (113 g): a compact down sleeping bag, or a jacket and thermals.
• 13 L (136 g): a three-season down sleeping bag.
• 20 L (160 g): a synthetic or winter sleeping bag, or the clothes for a week.
• 35 L (189 g): a big winter bag, or sleeping bag and puffy gear together.

Not sure between two? We'd size up. A bag with room to spare rolls shut properly, and the straps take up the slack.

Material and durability

The body is bluesign approved 70D nylon made from recycled yarn, with a PFAS-free water-repellent finish on the outside and a white coating inside, so you can find the head torch at the bottom without emptying the lot. It is flexible enough to push into an awkward corner of a pack and sturdy enough for paddling and bikepacking. Keep it clear of sharp edges and rough rock, as you would any fabric dry bag.

The roll-top closes with a 15 mm Field Repair Buckle: if one breaks on a trip, a new buckle goes on and the bag carries on.

Packing and carrying

Four straps pull the load down evenly so it does not bulge into a football. Two of them have side-release buckles, so you get back into the bag quickly at camp. A webbing handle on the base gives you something to grab when you haul it out of a full pack. Once it is compressed, wedge it in tight and it stays small.