Constructed from a combination of Nylon and Spandex, the Shield ZL7640 Elastic Knee Support features a four-way stretch fabric that targets essential areas for support while allowing a full range of motion. Compression technology is utilized to promote blood flow and aid in recovery, while the material is breathable for all-day comfort. It is not recommended to be used by individuals with eczema or skin trauma. If any abnormalities occur, discontinue use and consult a doctor immediately. When cleaning, hand wash the support in warm water with mild soap and thoroughly rinse. Air drying is advised. Available in sizes Small (9.4 x 4.6 inches), Medium (9.4 x 5.5 inches), Large (10.2 x 6.5 inches), and XL (10 x 7.2 inches), the support is sold in pairs.