The Nike Pro Patella Jumpers knee strap has the following features: The Nike Pro Patella Springers knee strap provides relief of the tendons from the kneecap and offers protection level 1. Attention: Do not wear this brace if there is still swelling. This can lead to knee cap problems. Features: protection: level 1 fit: semi-circular thickening on the inside, which must be placed under the kneecap. Comfort: soft, comfortable and elastic material. Velcro fastening. Temperature control: Dri-Fit technology ensures rapid moisture removal. Colour: black. Material: 33% polyester, 31% EVA, 17% neoprene, 13% polyamide, 6% elastane.