A 1-2 years old baby onesie is a one-piece garment designed for infants and toddlers. It typically features short sleeves, a crew neckline, and snap closures at the bottom for easy diaper changes. Onesies are often made of soft, breathable materials like cotton or bamboo to keep babies comfortable and dry. They come in a variety of styles, colours, and patterns, and can be worn on their own or layered with other clothing depending on the weather. Onesies are a versatile and essential item in a baby's wardrobe, and they are perfect for playtime, naptime, and everyday wear. They provide parents with a convenient and practical clothing option that is easy to dress and undress, making them a popular choice for busy parents and caregivers.