Introducing a completely new concept in compression dry bags no valve. This innovative sack uses an air permeable base made of eVent waterproof fabric, which allows air to be pushed out of the sack but won't allow water back in.Winner of Backpacker Magazine 2007 Editor's Choice Award. Rugged 70 denier nylon body and lid. Waterproof seams are double stitched and sealed. Reinforced stitching on all stress points. Roll top Hypalon closure with lid and four straps for even compression. Pull handle on bottom. Maximum volume: 366 cu. in. 6 liters. Minimum volume: 122 cu. in. 2 liters.