This unisex XT Twin Belt water bottle from Salomon is constructed with nylon material for durability. Zippered main compartment holds all your essential gear; removable belt pocket for extra storage. Quick fit belt adjusts easily with the pull of two straps to ensure the perfect fit. Airvent Agility back panel increases ventilation, to wick away moisture, and lightly pads the back for comfort. 4D bottle holder is inclined at 45 degree angle for quick, easy access to the bottle while running.