Anatomic Help 1502 Simple Elastic Knee Support with Open Patella is made from high-quality seamless knitted elastic fabric, offering maximum comfort and support. The product's unique features are: Elastic fabric: provides comfort and ease of use without putting pressure on the knee. Open patella: improves stability and mobility of the joint. Seamless tubular knit: minimizes skin irritation and offers an excellent fit. Anatomic Help 1502 Simple Elastic Knee Support with Open Patella features an open patella, allowing greater mobility and joint stability, making it ideal for mild knee injuries and post-surgery recovery. Sizes Knee Perimeter (cm) S 25- 30 M 30- 34 L 34- 38 XL 38 - 42 XXL 42 - 48