This multi function circular bag is made from 600denier PVC and printed felt. It can be used as a knapsack or you can re-adjust the straps to use as a shoulder bag or a purse. An ideal gift. 23cm Diameter. Why Use Felt? Anti Static Recoverable Colorfast Shock Absorber Mildew Proof Washable Heat Resistant Breathable Warp Resistant Water Proof Odourless Easy Maintenance