Why REINOS? Light as feather, totally won¡¯t burden you during outdoor activities. Adjustable shoulder and chest straps that make the pack bounce free. Large 2L water bladder keeps you hydrated easily when you are outside. Thermal insulated compartment keeps water cool for 4 hours at least. Extra two independent compartments to store your daily stuff Ventilated mesh cushion on the back to enhance comfort during daily wearing Lifetime guarantee, every REINOS backpack are backed by our no hassle warranty!