Keep him comfortable at practice with the Boys' HeatGear Long-Sleeve Baselayer Shirt. The long sleeves and HeatGear?? fabric will keep him warm outside on his way to practice, and sweat-wicking, quick drying fabric will keep him cool and dry on the court. Made of a soft and smooth polyester blend, it is lightweight and fitted for a more athletic cut. Four-way stretch construction allows for a full range of movement and the shirt also has anti-odor technology, which his teammates will thank him for. f. . . 90% Polyester, 10% Elastane. Fitted for a slimmer, more athletic cut. HeatGear?? fabric is soft and smooth for extreme comfort with very little weight. 4-way stretch construction moves better in every direction. Moisture wicking technology wicks sweat and dries fast. Anti-odor technology. Ragalan sleeves. Imported.