- Under Armour Boys' Bottom Size Chart - Little Kid - Under Armour Action Sports Chart - Under Armour Boys' Bottom Size Chart - Big Kid - Under Armour Boys' Top Size Chart - Toddler - Under Armour Boys' Top Size Chart - Big Kid - Under Armour Boys' Bottom Size Chart - Toddler - Under Armour Boys' Top Size Chart - Little Kid - Under Armour Boys' Top Size Chart -Infant - Under Armour Boys' Bottom Size Chart -Infant - Slide into bases with confidence in the Under Armour® Kids Utility Slider Shorts, compression-fit shorts with integrated padding at the hips and thighs designed to protect young ball players from turf burn and hard slides. HeatGear® fabric wicks sweat and keeps them cool under their uniform while the 4-way stretch moves naturally with every sprint and dive. - Integrated foam padding at hips and thighs absorbs impact during slides. - Flat-lock seams prevent chafing during extended wear under uniform pants. - 87% Polyester, 13% Spandex. - Slip-on closure. - Machine wash cold and tumble dry low. - Imported.