aden + anais Baby-Boys Newborn Muslin Long-Sleeve Zip One Piece 95% Cotton/5% Spandex Imported Machine Wash Our cuddly one piece has one long zipper that makes getting dressed a breeze, and the soft footies keep little toes warm when the temperature cools Softpre-washed for baby's comfort, and built to last - our items get softer with every wash Stretch5 percent spandex gives each item just the right amount of one-way stretch Breathablekeeps baby comfortable without overheating Covered zipper keeps zippers away from baby's soft skin