Thermo reactive technology. Improved recovery time - Absorbs natural heat and reflects far infrared back to the skin, helping the body recover. 4-Way stretch. Provides support to weak, injured, or arthritic knee joints. Support Level: Moderate. Since 1959 the Mueller family has been the trusted leader in sports medicine. We are dedicated to creating the highest quality products that help people recover and perform at their peak. - Curt Mueller. Trusted Brand - Family owned since 1959. 3-in-1: 1. Provides protective support to knee. 2. Helps improve knee position sense. 3. Helps relieve pain without affecting performance. Class 1 Medical Device - FSA eligible. Versatile design and can be worn with or without strap. Removable strap allows for varying levels of support and compression. Feed through loop on back of support for removable strap helps keep it in place. Anti-slip silicone waves at top of support. 360 degrees Targeted compression. Lightweight and breathable material. Antimicrobial (The antimicrobial treatment is intended to protect the brace against odor, staining and deterioration caused by bacteria and microorganisms. This treatment does not extend protection to the skin). Sizing: Size - SM/MD; Fits left or right knee; Measure circumference of the knee; Fits: 12.0 - 16.0 in / 30.5 - 40.6 cm. World Federation of Athletic Training & Therapy. Endorsed by the World Federation of Athletic Training & Therapy.