system in Alpine Compression Dry Bag, Cyclone Dry Bag, Cyclone Tapered Dry Sack
and Expedition Compression Dry Bag:
A one-way valve that automatically releases air as the bag is rolled down
to condense loads without letting water in. Waterproof up to 3 psi.
Radio-frequency seam welding used on all products: A process using
microwaves to bond like fabrics such as vinyl-coated nylon to itself or
urethane-coated nylon to itself. This allows us to make truly waterproof gear
without needle holes, which allow for leaks.