YKK zippers firmly secure contents within pack. Side buckle strap at chest secures pouch while maneuvering. Hook and loop panel and MOLLE webbing at the face of pack. Quick Detach shoulder straps include D-rings. Multiple compartments provide additional space for items. In the Box 1x Hydration Backpack (Water Bladder Not Included) Specifications: Material NylonSize Adjustable California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov