Please choose shoes according to your weight,
example:
36-38 yards (number L) gray blue 50-70kg
«36-38 yards (number L)»: indicates the size ;
"Blue gray": indicates the color;
"50-70kg": indicates the maximum weight range; 
Note: the product comes with instructions, hex wrench for easy assembly or maintenance .
Product category: Bounce / bounce shoes 
Material: TPU, TPR + mesh
Weight: 3.6 kg) 
Maximum load: 20kg - 75kg (kg)
Article no .: TL-01
Applicable scenes: running, gym, fitness, dance
size: 
30-32 yards (number S) gray red 20-40kg
30-32 yards (number S) gray blue 20-40kg
33-35 yards (number M) gray red 30-50kg
33-35 yards ( number M) blue gray 30-50kg
36-38 yards (number L) gray red 50-70kg
36-38 yards (number L) red rose 50-70kg
39-41 yards (number XL ) black red 70-90kg
39-41 yards (number XL) black blue 70-90kg
4 ...
The product is pretty nice and it arrived quite fast. It’s a bit hard to set it up, I was not able to do it alone and I needed help. The seller is great and kind. I super recommend it.