The marine-grade EVA lower maintains the bag's shape and provides extra protection not found in typical dry bags; TPU-coated 900D nylon with welded seams and waterproof zippers ensures your gear stays dry and secure in truck beds, ATVs, or even leaky wall tents; Rubberized webbing offers multiple attachment points for securing the bag or adding extra gear; Convertible carry straps make travel easy by allowing you to switch between carrying the bag over your shoulder or on your back; 40L - 24.5"L x 11"W x 10"H; 75L - 32.5"L x 14.5"W x 10"H