For sports athletic activity mild strain weakness due to previous injury Small fits knee from 6" to 8" Medium fits knee 8" to 10" Large fits knee 10" to 12" * Four-way stretch material provides even support over the knee * Retains natural body heat to help soothe discomfort and promote healing * Opening over the knee cap (patella) helps the support maintain its correct position * Breathable plush-lined material absorbs perspiration and wicks away moisture for extended wearing comfort