A onesie is a one-piece garment that typically covers the torso and legs, often designed for infants and young children. It usually features a snap closure at the bottom for easy diaper changes and is made from soft, comfortable materials like cotton. Onesies come in various colors, patterns, and styles, making them popular for everyday wear and special occasions. In addition to baby onesies, there are also adult versions known as adult onesies or jumpsuits. These garments are often used for loungewear or sleepwear and can feature fun designs, such as animal shapes or cartoon characters. Adult onesies have gained popularity for their comfort and playful aesthetic.