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. - 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. - Drawstring waistband for secure fit with three back pockets providing storage for phone, cards and keys as well as gels. - Powerful, lightweight PWX fabric with circular knit 360-degree stretch, reduces muscle movement and damage whilst maintaining flexibility for ultimate sports performance. - Firm graduated compression boosts blood flow to muscles, improving performance, lowering risk of injury and speeding up recovery. - High quality and durable yarns outlast the competition and keep the skin cool and dry. - Signature reflective X logos on thigh and calf. - Material 72% NYLON, 28% LYCRA