Why the Evac bag compresses without a valve
The Evac Compression Dry Bag works differently from a typical dry bag. Its base is made from a waterproof but air-permeable eVac fabric, so you can push air out through the base while water stays out. That means there is no purge valve to open or close, which keeps the bag light and simple.
The main body is a bluesign-approved recycled 70D nylon with a PFC-free DWR finish and a PU coating rated to a 10,000mm hydrostatic head. Seams are double-stitched and tape-sealed, and the roll-top closure uses a non-wicking design with a Field Repair Buckle. Four compression straps—two ladderlock and two side-release buckles—let you compress soft items evenly.
How to pack and compress a sleeping bag or clothes
Work on a clean, dry surface. The steps below apply whether you are packing a sleeping bag, a puffy jacket, or spare clothes.
- Choose the right size: The Evac comes in 5, 8, 13, 20, and 35 liter versions. Match the bag to your load: a 5 or 8 liter bag suits a compressed down bag or a few clothing items, while larger sizes handle bulkier loads. If you are unsure, start with a size that lets you roll the top at least three times.
- Load soft items loosely: Place your sleeping bag or clothes into the bag without forcing them. Avoid sharp objects that could damage the fabric. Leave enough room at the top to close the roll-top.
- Push air out through the base: Press down on the filled bag to force air through the eVac base. You do not need to open a valve. Keep pressing until the bag feels firm and most of the air is expelled.
- Roll the top closed: Fold the top over and roll it down at least three times. The non-wicking closure helps keep water out. Secure the buckle.
- Tighten the compression straps: Use the four straps to compress the load evenly. Tighten the two ladderlock buckles first, then the two side-release buckles. Adjust until the bag is compact and firm, but do not over-tighten to the point of straining the fabric or seams.
Key features that affect packing
- Evac Lightweight Compression Dry Bag (Like New): Waterproof and air-permeable eVac fabric base allows air to be pushed out but water can't get in. You can compress without a purge valve, saving weight and simplifying packing.
Evac Lightweight Compression Dry Bag (Like New) - Evac Lightweight Compression Dry Bag (Like New): Four compression straps make it easy to evenly compress soft items. Even compression helps the bag pack more efficiently and reduces bulging.
- Evac Lightweight Compression Dry Bag (Like New): Light-reflecting white interior coating makes seeing and finding gear easier. You can quickly identify contents when packing or unpacking in low light.
Tips for packing clothes and sleeping bags
For a sleeping bag, stuff it loosely rather than rolling it tightly; this helps preserve loft. For clothes, bundle softer items together and place them so they fill gaps. The Evac bag is designed for soft items, so avoid packing hard or pointed objects that could puncture the fabric.
If you are packing multiple items, use separate bags for dirty clothes or wet gear to keep everything organized. The 5 and 8 liter sizes work well for a sleeping bag or a day's clothing, while the 13, 20, and 35 liter sizes suit larger loads like a full backpacking kit or family camping.
Checkpoints before you seal the bag
- Bag is not overfilled: You should be able to roll the top at least three times without strain.
- Air is expelled: Press down on the bag to push air through the base before rolling closed.
- Roll-top is secure: The buckle should be fastened and the roll tight.
- Straps are evenly tightened: Compression should be balanced, not lopsided.
What to expect from the Like New version
The Evac Lightweight Compression Dry Bag is available in Like New condition through Second Summit. Like New gear is a way to get the same design and features at a lower price. The bag comes in High Rise Grey or Turkish Tile Blue, and in sizes from 5 to 35 liters. Check the product page for current availability and condition details.
