The stars in number result above leave little room for doubt: in fact, the product is fairly well done and helps relieve knee well when it is slightly painful. However, for the future buyer is not disappointed, it is useful to clarify that this is a support material, and no protection (as can fully opaque knee). Also, I advise against this for anyone practicing a contact sport and having a weak knee.
This drawback aside, for the price, hard to beat. The smell of the product is slightly pungent (and is where product composition?) And struggles to evaporate definitely, but therein lies the only fault I could find in my use. Both on mild exertion (running) on an intense and brief effort (squash), this "knee-bandage" has held up well. Also, used to prevent post-sports activity pain, they were much lower in the joints of the knee, and it repeatedly (it does not happen to me for once what!).
In summary, this is a product of the simplest, ultra-competitive price will fill those for whom knee joints creak a little. However, for severe pain, prefer a more protective product to enable a better maintaining constant knee ...