The medium sized, 40L Prolog Bag is designed to be carried easily, durable and waterproof on the bottom so you can set it down anywhere, and organized to protect clean items from dirty or sweaty ones. Great as a big gym bag, or any adventure outdoor travel. Rugged, waterproof bottom stands up to abuse on global adventures. Weight: 670. Pack weight (LB OZ)17 oz. Dimensions 65 x 30 x 25 cm. Pack volume (CI)2440. Pack volume (L)40. Pack weight (G)483. Material: Polyester, Nylon.