They grow up so fast - so dress your little one in this adorable short-sleeve onesie while you really are still the only thing on his mind. Before he discovers the dog, the mud outdoors, and things he shouldn't be putting in his mouth. This onesie comes in a variety of colors, and is made from 100% cotton (except for the heather shades, which are 90/10 cotton/polyester). It also comes in a range of sizes, to suit infants of 3 months up to 2 years. The roomy neckline and snap closure make it easy to dress and undress baby. Note that this is not a sleepwear product, and that if you machine-dry it, it will likely shrink an average of one size.