Seibertron Military Outdoor Casual Fanny Pack Bum Bag Riding Running Race Waist Bag Multi-function Chest Bag Satchel Treadmill Carrying Iphone 4/5/5s/5c/6+ 1.900D waterproof fabric, wearable,easy to clean out the dust and stains 2.Waist adjust dimension:70-130cm OR 28-51 Inch 3.The middle compartment, double direction zipper,large capacity for your belongings 4.Zipper: customized SBS thick anti-wear nylon zipper slider We use complete SBS zippers and slides exclusively unlike our competitors who put slides on generic zippers 5.Please kindly refer to the size chart before placing order.