The Mueller Sports Medicine Thermo Reactive 4-Way Stretch Elbow Support provides all-day moderate support for sore or injured elbows. The soft, breathable and lightweight 4-way stretch fabric moves with you for extra comfort. Made with thermo reactive technology, it regulates skin temperature and blood flow for an improved recovery time. This elbow support provides 360 degrees of targeted compression that is latex-free. To clean, hand wash in cold water with mild detergent. Do not use bleach or fabric softener. Rinse thoroughly and air dry. Includes one elbow support that fits left or right elbow. Sizing: Small/Medium - 7" to 10" elbow circumference. Medium/Large - 10" to 13" elbow circumference. Large/X-Large - 13" to 17" elbow circumference.