2XU Women Light Speed Mid-Rise Compression Tights - Black / Black ReflectiveLight Speed Mid Rise Compression Tights The Light Speed Mid Rise Compression Tights with revolutionary Muscle Containment Stamping (MCS) technology are developed with a detailed understanding of the impact running has on the legs, reducing muscle movement, damage and fatigue for your best run yet. FEATURES: MUSCLE CONTAINMENT STAMPING (MCS) Muscle Containment Stamping (MCS) traces quadriceps; to dissipate the load transfer on the knee joint, and calf;