DonJoy Performance Trizone Calf Compression Sleeve for Compression, Muscle Fatigue, Soreness, Achilles Tendonitis Support, Swelling, Warming &ndash; Ideal for Running, Cycling, Workouts, Recovery Three zones of compression strategically placed around the shin and calf deliver peak performance Silicone banding injected directly onto the sleeve wraps and supports the calf muscle during activity to significantly delay the onset of fatigue All-natural carbonized bamboo is thermal regulating and anti-bacterial helping eliminate odors Anti-migration technology helps to eliminate slip Reflectivity for enhanced visibility in low light conditions