MUELLER KNEE SUPPORT, ELASTIC, BEIGE - XL Model: 426XL | SKU: MU321933 Knee Support Elastic. This lightweight elastic knit provides firm support and maintains full range of movement for stiff, weak, or sore knees. The contour design helps prevent bunching and slippage to ensure a proper fit. The custom top weave also helps prevent rolling. Slip sleeve onto knee and adjust as needed for a comfortable fit. See Sizing Chart at http://www.muellersportsmed.com/Sizing_Knee.htm