Serial Number: 1	Serial Number: 2
Serial Number: 3	Serial Number: 4
Serial Number: 5	Serial Number: 6
Serial Number: 7	Serial Number: 8
Serial Number: 9

9，10 for the band backpack models
Material: thick green EVA material
Dimensions: see below
M number， suitable height 150-170cm
L number， for height 165-180cm
XL number， for height 175-190cm