Check the listing for details. Mueller Breathable Closed Patella Knee Sleeve. Color: Black, Condition: New. Listed at 26.99 USD. Mueller Breathable Closed Patella Knee Sleeve Helps support sore, weak, injured or arthritic knees and helps improve circulation to assist in healing and increased joint flexibility. Features: Slide on/off design for easy fit with finger pulls for easy grip Contoured shape fits left or right knee Neoprene blend provides even compression and soothing warmth Perforated neoprene for added ventilation Side air mesh panels for added breathability Soft touch printed liner Extended length for a better fit Antimicrobial treatment helps control odors Not made with natural rubber latex Sizing Chart: Measure the circumference of the knee to determine the correct size: SIZE Circumference XS 10" - 12" SM 12" - 14" MD 14" - 16" LG 16" - 18" XL 18" - 20" 2XL 20" - 22" 3XL 22" - 24" 4XL 24" - 26" 5XL 26" - 28"