Sea to Summit took the versatile and durable Lightweight Dry Sack and added a TPU windowthat offers excellentvisibility. This is particularly useful for groups sharing common gear. Made from a lightweight 70D waterproof, durable nylon fabricwith a white interior lining in addition to the TPU window for greater visibility.Using the same hypalon non-wicking, roll-top closure as their other dry sacks, featuringa D-ring attachment point at the buckle and available in multiple colors for packing organization, these are ideal for backpacking, cycle touring, travel, ski touring and more.