Come and Check Our Promo Solutions.The backpack is made of water-resistant and tear-resistant nylon. Integrated breathable mesh pad on the back for maximum breathability and heat dissipation. Chest strap and waist strap can fix the bag so the bag will not move while riding, wide webbed shoulder straps help to reduce the burden of your shoulder. Adjustable shoulder straps and waist straps fit your cycling, jogging, running needs. Suitable for both men and women. Pls check inventory and detailed info with us before placing your orders.