Check the listing for details. Mueller Breathable Open Patella Knee Compression Sleeve. Color: Black, Condition: New. Listed at 26.99 USD. Mueller Breathable Open Patella Knee Compression Sleeve The Breathable Open Patella Knee Sleeve is intended to provide relief and support to knees that are weak, sore or injured. This sleeve is designed to slide on and off the knee with no struggle. The sleeve has a contour design that can be worn on the left or right knee. The buttress located beneath the kneecap provides additional support to the patella. The knee is open for pressure and stress relief at the kneecap. Neoprene blend fabric provides thermal heat to the knee region to promote healthy blood flow for faster healing and pain relief. Breathable Open Knee Sleeve Features: The sleeve is intended to provide pain relief and support to the knees. Includes finger pulls to easily slide the sleeve on and off. Side mesh panels and perforated fabric allow airflow to the leg and knee. Built in support buttress located below the kneecap. Antimicrobial material helps to prevent bad 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"