I can’t say that it holds it tightly, but with gonarthrosis of the 3rd degree it allows me to at least walk. The Velcro is strong, but the threads bloom quickly. It mainly holds on the sides and does not allow the knee to bend completely. But it unbends to the full and does not hold the cup, since it is fastened in front, there is no ring. In order not to slip, you have to tighten it tightly.
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