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shoulder strap and back are made of breathable mesh padded that can provide you all day comfort. hands-one shoulder bakpack that can be worn as a crossbody or sling backpack for easy-access to everyday essentials like phones and wallets shoulder strap can be attached to left side or right side, suitable for both left hand and right hand people great for work ,travel ,school, gym, or outdoors. also perfect for using as a diaper bag. also the straps are stregthened with strong and strudy stitching for durable use..syi