The Sea to Summit eVac 3L Dry Sack is an essential item for the serious outdoorsman or regular traveller. It features Bluesign-approved recycled 70D nylon waterproof main body fabric as well as an air-permeable eVent fabric on the base that allows for valve-free air expulsion and compact packing. Instead of straps, a buckle closure is used for compression. The sack's oval shape means it fits easily into backpacks.