Come and see our amazing products. Crafted from nylon,this backpack is waterproof and hard wearing, and it can be carried to anywhere after folded.It has a large compartment that is enough for 2L water bladder and other items.The reflective trim makes the user safer at night,and the survival whistle is useful in unexpected occasion. It's an pack that is suitable for cycling,climbing,camping,hiking,etc. Pls confirm further with us if any query about packing info, inventory status and time schedule.