Skins Essential MX Calf Compression Running Tights - SS16 400 Fit - A super comfortable fit, more precise, targeted Dynamic Gradient Compression and a greater range of leg lengths for men and different body shapes for women Dynamic Gradient Compression - Delivers more oxygen filled blood to active muscles to increase power and stamina 50+ UPF Protection - UPF offers protection from harmful UVA and UVB rays from the Sun. Moisture Management - The wicking fabric draws moisture away from your skin so you stay dry and comfortable but still warm. Muscle Focus - Uniquely wrapping and supporting your key muscle groups to reduce movement and focus direction for less vibration in your muscles, less soft tissue damage and less soreness after exercise.