93% polyester, 7% nylon; Storm Technology delivers an element-battling, highly water-resistant and stain-resistant finish; EVELED strap system guides you to assure straps are adjusted eenly for balanced weight distribution; Soft-lined laptop sleeve - holds up to 16" laptop; Fully expandable main compartment to fit all your gear and secondary compartment works as a shoe/laundry pocket; Secure zip front pockets for essential item storage; Side water bottle pocket that fits 32oz bottle; Adjustable, removable UA strap clip on shoulder to prevent duffle bag from falling off when carrying both; Molle webbbing for additional attachment points