Sea to Summittook the versatile and durable Lightweight Dry Sack and added a TPU window that offers excellent visibility. This is particularly useful for groups sharing common gear. Made from a lightweight 70D waterproof, durable nylon fabric with a white interior lining in addition to the TPU window for greater visibility. Using the same hypalon non-wicking, roll-top closure asthe other dry sacks, featuring a D-ring attachment point at the buckle, these are ideal for backpacking, cycle touring, travel, ski touring and more.