Elastic cotton construction w/sewn-in silicone donut for inferior, superior, medial & lateral patellar stabilization. Closed patella section & dual spiral stays offer medial & lateral support. To address mild patella discomfort. #11-0242-2 –Sm Each #11-0242-3 –Md Each #11-0242-4 –Lg Each #11-0245-2 –XLg Each Measure at thigh circumference 6" above mid-patella UNSPSC#42241700