【Back method】: shoulder， shoulders， portable

[Accessories]: 2 straps， not removable， can be adjusted

【Shoulder strap length】: 76CM or so， according to their needs to adjust the length of shoulder strap

                (Different people will have different measurement methods 2cm-3cm about the error is normal)

【Baoshen Size】: Size: Width: 29cm Height: 35cm Bottom Thickness: 17cm