Nylon Hydration Sports Backpack with Thermal Water Bladder

Looking to construct a successful new promotional campaign?Sports backpack,made of ultralight waterproof nylon fabric.Adjustable shoulder strap,chest strap and waist strap to fit your need.With whistle design on the chest strap.Ergonomic design on the back for maximum breathability and comfort.Reflective strips for safe riding at night.Rain cover included.Suitable for outdoor activities like cycling,rock-climbing and hiking,etc.Showing your brand wherever you go!