Official USMC Military SealLine Waterproof Dry Bag Sack 65 L * Capacity: 65 Liters/3966 cu. in * Extreme Durability: 210D oxford nylon with high-tenacity polyurethane coating * Air-Tight Compression: Manually operated lightweight purge valve with 1000lb crush rating * Light Weight: The best combination of light weight and extreme durability for a wide range of uses