MooMoo vests with poppers have long sleeves and are 100% cotton. They are sold in a 2-pack, and are ideal for toddlers who still wear nappies at night (or in the day for that matter!), as they help to keep toddlers warm and their nappies in place. Features include the best quality cotton, sturdy poppers, and an embroidered badge on the front. They work beautifully under MooMoo kiddigrows.