The Power Leg

Features: 
1. Adjustable length, easy to disassemble Velcro
2. Specially made spring, strong rebound force
3. When you pick up, your knee strength can be increased by 40kg.
4. Pants can be worn inside and outside, and the length can be adjusted evenly
5, carbon steel spring
6 mesh ventilation
7, universal straps
8, non-slip fabric