Proflex® Open Patella Knee Sleeve, Extra Large, Sold As 1/Each Ergodyne 16535 Neoprene And Spandex Knee Sleeve Is Open At The Patella And Will Aid Mobility After A Knee Sprain Or Strain. 3-Millimeter-Thick Neoprene Is Perforated And Spandex Is In Mesh Form So Knee Sleeve Is Breathable. Knee Sleeve Has An Anterior Pad Which Adds Cushioning Around The Kneecap For Enhanced Comfort And Support. Knee Sleeve Will Fit Left Or Right Knee And Is Machine Washable. To Determine Size, Measure The Circumference Around The Center Of Your Knee While The Knee Is Extended: Extra Large Fits 23 – 25-1/2 Inch Circumference. Knee Sleeve, Neoprene Open Patella & Anterior Pad Xlg Knee Support Proflex® X-Large Pull-On Left Or Right Knee Proflex®Sku: Mck-809684_Ea Mfgr Sku: 16535809684_EaShips In 2-7 Days