• 900D waterproof fabric, but the zipper is not waterproof. Backpack exclude helmet,basketball,waterbladder,but fit full face helmet,basketball,seibertron 2L water bladder and so on.
• Water bladder, capacity:2L water bladder is made by TPU Material, high strength, durable Can withstand the water temperature range : -20 to 50 degree Celsius.
• PVC Reflective Material In the dark. SquareSize: 3" L x 2" W x .2" D (7.5 x 5 x .4 cm)(aprox /- 5%)