New Other DonJoy Performance Large Trizone Calf Sleeve Black feed cond new IMX Technology features the best FuelCell foam delivers a IMX Technology features the best in materials and design for great strength and durability and the best possible performance Grip is starting to be worn from storage 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 Box damage due to storage