Top closure cinches shut with small cord and cord lock; pull handle on bottom Silicon impregnated Cordura nylon is weatherproof, lightweight, and durable Seams are double stitched for long-lasting durabilty while hiking and backpacking Comes in assorted colors SPECS Best Use:   Backpacking Material:   Nylon Weight: (2.5L) 0.4 oz / (4L) 0.5 oz / (6.5L) 0.6 oz / (9L) 0.7 oz / (15L) 1 oz