This zip one piece is super soft and comfortable. Featuring a zipper that runs from the top of the outfit to the ankle. The zipper is 2 way, making for super easy diaper changes without having to remove the whole outfit. The fabric is super stretchy and breathable, made from bamboo viscose-wait until you feel how soft it is! These run about one size big leaving room to grow but are meant to have a slim fitted look to them. Mitten cuff on arm keeps baby from scratching, if needed. Fold-over foot at ankle can be used on chilly days. Please note: newborn size is footed. We recommend purchasing true to size, but they are meant to have room to grow.