This knee booster has three built-in springs to enhance the strength of the knee and support the knee. It is mainly aimed at people with knee discomfort. This product reduces knee pressure, relieve knee pain, upper and lower band can bidirectional fixation of patella, reduce the impact of the knee. Compared to many protective products, this booster directly acts on the leg, which can successfully feedback the energy released by your walking back, thus playing the role of protecting the knee. In terms of details, the booster is made of a selection of soft and comfortable fabrics, and skin stickers are not irritating. It's also nice to dress up for a walk in the summer. The overall material of the booster is nylon + aluminum + carbon fiber, all materials are for safety, lightness and strength. Bionic design, comfortable to wear. Ergonomically bionic design fits the human body and is suitable for different leg lengths and leg shapes, etc., to protect the knee from the injury risk of daily touchdown impact and provide care for the knee joint. The device is very convenient to put on and take off. It adopts a thoughtful lightweight design, which does not increase the burden on the legs. It is relatively convenient to wear in the actual experience, and the wearing method is also relatively simple. If mountaineering choose this product, it should save a lot of effort. Velcro design can also make the booster become more tight when wearing, strong adhesion force so that different users can also wear the same product. In the middle is the core of the booster, and as the energy from your thighs and calves is transferred to the booster, the booster starts to store energy, and as you continue to walk, the booster transfers that energy back to you, so that you can walk effortlessly.