Feature: 1. Increase 40kg Strength: Add 40kg strength to the knee, reduce the pressure on the knee after squatting, specially made, the spring is strong. 2. Universal Strap Style: Men, women and children can wear it to reduce the damage caused by weight to the knees. 3. Mesh Breathable: Unsealed, Converted to Coolie Design, Non Slip Fabric. Exercise becomes easier, work becomes easier, squatting becomes easier, and life becomes easier. 4. Features: After wearing a booster, it is recommended to use 3 springs when the knee is bent by about 45° to assist in climbing, carrying heavy objects, and those with serious knee damage. 5. Spring Assist: It is recommended to adjust 1‑2 spring assists for walking, climbing, running, and cycling to protect the knees strongly. Specification: Item Type: Knee Booster Product Material: Diving Material Product Size: Approx.71 x 30cm / 28 x 11.8in (There is a 1-3cm Error in Manual Measurement) Product Function: Protect the Knee from Gravity Injury, Suitable for Climbing, Mountaineering, Sports Fitness, Heavy Lifting, Etc.. Package List: 1 x Knee Booster