Increase your comfort and performance by wearing Umbro's Player Elite Power Shorts. These supportive base-layer shorts are constructed from a performance stretch jersey with breathable mesh sections and ergonomically placed flat-lock seams that sit close to the body, reducing irritation while you work out. Finished with a comfortable stretch waistband and the Umbro diamond logo featured on the leg. Polyester & Elastane. Breathable Mesh Sections. Ergonomic Placed Side Seams to Aid Performance. Flat Lock Seams Sit Close to the Body Ensuring Limited Irritation During Workout.