Compressport Ultra Silicon Leg Warmers White 2016 Extra Comfort: The Compressport US Compression Calf Guard is uniquely enhanced through the integration of a layer of 220 silicon gel buds surrounding the interior of the sleeve above the ankle. Enhanced Performance and Recovery: The Ultra light Compressport fabric is designed to boost venous return from the feet to the heart, resulting in better recovery and more power and endurance whilst playing your favourite sport. Injury Prevention: Compressport fabric provides rigidity and support to muscles and is designed to reduce muscle vibration preventing muscles tears and joint pain.