Overview The Sea to Summit eVac Lightweight Compression Dry Bag combines waterproof storage with built-in air evacuation, allowing soft gear to be compressed without using a separate purge valve. Its waterproof, air-permeable eVac base lets trapped air escape as the bag is compressed while helping keep water from entering. Built from lightweight bluesignA(R) APPROVED recycled 70D nylon with a non-PFAS DWR finish, the bag is designed for travel, paddling, bikepacking, camping, and other outdoor adventures where compact dry storage matters. Four compression straps help reduce bulk evenly, while the non-wicking roll-top closure and tape-sealed seams provide dependable protection for packed gear. Best For Sea kayaking and paddling Bikepacking and bicycle touring Camping and backpacking Travel and luggage organization Compressing clothing, sleeping gear, and other soft items Not Ideal For Submersion applications unless specifically permitted by the manufacturer Sharp or rigid items that may damage the lightweight fabric Key Features eVac Air-Permeable Base: Waterproof base allows trapped air to be pushed out during compression without requiring a purge valve. Waterproof Construction: PU-coated recycled 70D nylon body provides a 10,000 mm hydrostatic head. Recycled 70D Nylon: Lightweight main body fabric uses pre-consumer recycled nylon for a balance of low weight and durability. bluesignA(R) APPROVED Fabric: Main body material meets bluesignA(R) approval requirements. Non-PFAS DWR Finish: Exterior durable water-repellent treatment is formulated without PFAS. Non-Wicking Roll-Top Closure: Hypalon roll-top helps create a reliable seal without absorbing water through the closure material. Field Repair Buckle: Patented buckle system can be replaced in the field if damaged. Four Compression Straps: Two ladderlock straps and two easy-access side-release buckle straps help compress contents evenly and reduce bulging. Waterproof Seams: Double-stitched and tape-sealed seams help maintain waterproof protection. White Interior Coating: Light-reflecting interior makes it easier to see and locate gear inside the bag. Integrated Grab Handle: Nylon webbing handle on the oval base provides a secure carrying and handling point. Specifications Brand: Sea to Summit Product Type: Lightweight Compression Dry Bag Main Body Material: 100% Pre-Consumer Recycled Nylon Fabric Weight: 70D Roll-Top Material: Hypalon Buckle Material: Polyformaldehyde Screw Material: Stainless Steel Shape: Round Hydrostatic Head: 10,000 mm Repair Buckle Size: 15 mm DWR Finish: Non-PFAS Available Sizes: 5L, 8L, 13L, 20L, 35L Size, Weight & Dimensions Size Weight Dimensions 5L 3.5 oz 6 x 7 x 12 in 8L 4.0 oz 7 x 8 x 16 in 13L 4.8 oz 8 x 9 x 18 in 20L 5.6 oz 9 x 10 x 18 in 35L 6.7 oz 12 x 13 x 22 in How the eVac Base Works As the four compression straps are tightened, trapped air is pushed through the air-permeable eVac base. The base is designed to let air escape while resisting water entry, allowing the bag to compress without the bulk and complexity of a separate purge valve. What&';s Included One Sea to Summit eVac Lightweight Compression Dry Bag in the selected size Not Included Contents or gear shown for demonstration Additional storage bags FAQs Does this bag need a purge valve? No. The eVac base allows trapped air to escape through the fabric while the bag is being compressed. Is the bag waterproof? The body fabric is waterproof with a 10,000 mm hydrostatic head, and the seams are double-stitched and tape-sealed. Use the roll-top closure correctly to maintain the intended seal. How does the bag compress gear? Four compression straps surround the bag and help reduce the volume of soft contents evenly while minimizing bulging. What sizes are available? The eVac Lightweight Compression Dry Bag is available in 5L, 8L, 13L, 20L, and 35L capacities. What is the bag made from? The main body uses bluesignA(R) APPROVED recycled 70D nylon with a non-PFAS DWR finish, while the roll-top uses Hypalon and the hardware includes a field-repairable buckle. Care & Maintenance Empty the bag after use and allow it to dry completely before long-term storage. Rinse away salt, sand, dirt, or debris as needed, especially after marine use. Keep sharp objects away from the lightweight fabric and inspect the roll-top, seams, compression straps, and buckle periodically for wear or damage. Expert Insight The standout feature of the Sea to Summit eVac Lightweight Compression Dry Bag is that it combines compression and dry storage without relying on a separate valve. For soft gear such as clothing or sleeping equipment, the air-permeable base and four-strap compression system make it easier to reduce packed volume while keeping the system simple and lightweight.