Sea To Summit took the versatile and durable Lightweight Dry Sack and added a TPU window that offers excellent visibility, making it perfect for groups sharing common gear. Made from a lightweight 70D waterproof, durable nylon fabric with a white interior lining, they also have a TPU window for greater visibility. Using the same hypalon non-wicking, roll-top closure as their other dry sacks, and featuring a D-ring attachment point at the buckle, they're also available in multiple colors for packing organization. Just ideal for backpacking, cycle touring, travel, ski touring and more.