Made from lightweight Rip-Stop fabric which packs down better than a traditional Dry Bag. Seams are fully taped and waterproof. Use them for backpacking, adventure travel or water sports. Not intended for situations where dry sack will be submerged under water. Size: 7.5" x 15" (10 L), 10" x 20" (25 L), 12" x 30" (55 L).