Knee Sleeve with Compression Fits left or right knee Patella ring stability to the kneecap. Equipped with two stays to provide added stability and firm compression to support the knee Includes Non-slip silicon strips Knitted construction using a multidirectional elastic fabric Anatomical 3D knit design to help provide effective and targeted compression and support Breathable, elastic, soft knit for enhanced comfort Stretch zone over the back of the knee to aid breathability, comfort, and freedom of movement Materials: Nylon, Spandex, Silicon & Carbon Steel. Sizing Guide: Measure thigh circumference (15cm above mid patella) (cm) Small: 39 - 42cm Medium: 43 - 46cm Large: 47- 49cm X-Large: 50 - 53cm