Ultralight and waterproof compression.Perfect dry compression storage to keep gear reliably dry and compact inside a backpack or bike bag. Made from bluesign APPROVED ultra lightweight Ultra-Sil 30D Cordura® nylon with a non-PFAS DWR, and an Evac fabric air permeable base with a non-PFAS DWR finish that allows you to push air out while still keeping your contents dry inside. This means no need for a purge valve, making the Evac Compression Dry Bag UL light and simple. Compression straps make it easy to evenly compress soft items, and the Hypalon non-wicking roll-top closure also keeps the water out. Simple, extremely light and reliable - the perfect dry compression solution for internal use.Sea to Summit Evac Ultralight Compression Dry Bag - 20L Features: Waterproof and air-permeable EVAC fabric base allows air to be pushed out but water can't get in Waterproof, roll-top closure secured with our patented Field Repair Buckle for a reliable seal Compress soft contents to their smallest possible size while adding minimal weight to your pack Ultra-lightweight, bluesign® APPROVED Ultra-Sil 30D Nylon main body fabric with a PFC-free DWR finish Waterproof seams you can trust- double-stitched and tape-sealed Fast and easy access through compression strap side-release buckles Eliminate bulging and achieve even compression using the four ultralight straps with two ladderlock and two easy-access side-release buckles Generously sized straps allow max-capacity filling with reinforced stitching on all stress points for added strength Not intended for paddle/watersports or bikepacking (mounted externally) use