A layette purchase is a collection of items for a newborn baby, typically including onesies. A onesie is a one-piece garment that covers the torso and legs, usually with snaps at the crotch. It is often worn by infants and toddlers as an alternative to separate tops and bottoms. Layette purchases are often given as gifts to new parents, and can include items such as blankets, sleepers, bibs, and hats.