PowerLayer Men's & Boy's Thermal Performance Baselayer Shirt & Pants Set Lightweight and stretch athletic fit compresses key muscles to improve power and endurance Moisture wicking fabric is quickdry keeping you dry, light and comfortable Flat lock seams eliminate skin irritation with a large elasticated waistband on the tights for comfort Mixed with technical performance fabrics which helps regulate your body temperature Perfect top & tight set to be used individually or in combination for intense workouts: running, gym or sports