The Light Speed 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.The Light Speed 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. Fabric Benefits: MUSCLE CONTAINMENT STAMPING (MCS) Muscle Containment Stamping (MCS) traces quadriceps; to dissipate the load transfer on the knee joint, and calf; to alleivate muscle strain during the toe phase of running. LIGHTWEIGHT & FLEXIBLE SUPPORT Powerful, lightweight PWX fabric with circular knit 360-degree stretch, reduces muscle movement and damage whilst maintaining flexibility for ultimate sports performance. GRADUATED COMPRESSION Firm graduated compression boosts blood flow to muscles, improving performance, lowering risk of injury and speeding up recovery. WAISTBAND STORAGE Drawstring waistband for secure fit with three back pockets providing storage for phone, cards and keys as well as gels. QUICK-DRYING High quality, durable, moisture-wicking yarns outlast the competition and keep the skin cool and dry. BE SEEN Signature reflective X logos on thigh and calf provide 360-degree visibility in low-light conditions.