An infant outfit typically consists of a layette and a onesie. A layette is a set of clothing and accessories for a newborn baby, usually given as a gift. It typically includes items such as sleepwear, blankets, and other items. A onesie is a type of garment that is designed to be worn by infants and young children. It is usually made of cotton or a cotton blend and has snaps at the crotch for easy diaper changes. Together, a layette and a onesie make up an infant outfit.