Design Details: Non-wicking Hypalon roll-top closure with patented field repair buckle for durability and easy sealing Valve-free, air-permeable eVent fabric base allows soft items to be compressed efficiently Fully-taped, waterproof seams with double stitching for enhanced waterproof integrity Recycled 70D nylon sidewall fabric with Non-PFC DWR finish, Bluesign approved 70D eVent face fabric is Non-PFC, offering high strength and durability New base lash loop compatible with optional shoulder sling strap attachment Oval shape for easy stacking and packing Lightweight, high-density waterproof fabric with 70 Denier 210T nylon and PU coating inside for visibility and protection White PU coating reflects light and helps identify contents inside dry sacks Dual waterhead ratings: 2,000mm for general dry sacks and 10,000mm for lightweight dry sacks and compression sacks Technology Materials: eVent fabric: waterproof, breathable membrane with micro-fine pores that allow water vapor but block liquid water eVent membrane is oleophobic (oil-repellent), preventing clogging and maintaining breathability without needing a PU backing PU coatings are thicker for waterproofing but reduce breathability; eVent?s membrane avoids this issue by being oil-repellent eVent fabric can act as a purge valve, allowing air to escape under pressure for efficient compression Additional Details: Brand: Sea to Summit