Used EVS RS9 knee braces size large. Sizing Details: Large (Calf / Thigh): 14" - 16" / 20" - 23". The RS9 Knee Brace is one leap forward for form-fitting knee brace design incorporating a redesigned chassis for improved airflow, updated buckle locations for improved connectivity and a fully removable / replaceable strapping system. Dual Defense - Total tracking knee cup for full time knee protection; knee cup tracks along a full length guide strap. Tru-Motion 2.0 - Anatomically correct hinges track natural knee movement and reduces migration; adjustable hyperextension lock-outs. ClickTec - Quick-release buckle system; fully adjustable for easy strap adjustment; adjust once, get in and out fast. FormFit Frame - Frame forms to all leg contours; lightweight and impact resistant injection molded shell. ComfortDry Liner - Ultra-breathable liner keeps you cool and dry; removable / washable for easy maintenance; three compression straps ensure a solid secure fit. FormFit Frame. Lightweight and impact-resistant injection-molded shell. Provides impact protection and knee stabilization. Tru-Motion 2.0 anatomically correct hinges. Moisture-wicking bio-foam molded liner: removable / washable. Adjustable hyperextension lock-outs. Dual Defense total tracking knee cup design. Sold as a pair. EVS Tru-Motion 2.0: The patented EVS Tru-Motion 2.0 hinge (TM5+) enables the RS9 Pro to stay suspended on the leg in the intended position during the full range of motion with the natural roll and glide movement that mimics the natural arthokinematics of the knee. If a brace has migrated down the leg and the hinges are not aligned with the medial and lateral condyles of the knee - midline, hyperextension cannot be controlled effectively and injury can occur; the TM5+ hinges and RS9 Pro are designed to reduce the risk of that occurring.