Under Armour Baby Boys' Newborn Home of The Free Set 100% Cotton Imported Machine Wash Charged Cotton bodysuit is ultra-soft for all-day comfort. Closed-hole mesh shorts balance durability with breathability. Signature Moisture Transport System wicks sweat away from the body. 3-snap bottom allows easy changing. Bodysuit: Cotton/Polyester. Shorts: Polyester. Textured-mesh shorts balance durability with breathability.