Material: special material
Size: Upper width: 27 / Lower width: 28al/ Height: 22/ Thickness: 10
Shoulder straps: unbelievable
Structure: No built-in interlayer belt
Function: single shoulder / diagonal
Capacity: Can't put A4 paper into IPAD

Small size display
Material: special material
Size: Upper width: 23au/ Lower width: 25au/ Height: 20au/ Thickness: 10au
Shoulder straps: can't be described as long or short
Structure: No built-in interlayer belt
Function: single shoulder / diagonal
Capacity: M4 paper cannot be put into IPAD