This pack is made of top quality raw materials which are REACH standard and Eco-friendly. The waterproof ripstop fabric of this pack keeps your stuff away from water when it rains. The cotton ripstop ,canvas lining and cotton webbing belt make this waist packs is much more durable and has soft hand feeling. This cotton waist packs can keep away moisture and circulates air between your waist or back and the pack. It can be washed by machine instead of by hand since fabric is COLORFAST.