Exped waterproof compression bag 13l waterproof compression bag with purge valve and horizontal compression straps use this lightweight bag to easily and quickly compress sleeping bags or clothing adjustable straps compress the bag horizontally to the desired volume slim shape lashes easily to the side of a backpack the waterproof compression bag is easy to handle with quick release buckle on the roll top closure counter grip at base and the flat purge valve to expel air ideal when addi