The Light Speed Compression Shorts 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 ever. MUSCLE CONTAINMENT STAMPING (MCS) Muscle Containment Stamping (MCS) traces quadriceps; dissipating the load transfer on the knee joint during running LIGHTWEIGHT & FLEXIBLE SUPPORT Powerful, lightweight PWX fabric with circular knit 360-degree stretch, reduces muscle movement and damage whilst 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 logo on thigh provides visibility in low-light conditions Key Features: > Compression short > PWX highly powerful, lightweight and flexible compression fabric > Quadriceps MCS > Drawstring waistband for adjustable secure fit > Large pocket for phone > Zip pocket for cards and keys > Mesh pocket for gels and other items > Signature reflective X logo on thigh > Flatlock seams to reduce chafe