Made from custom-milled Lunaluxe™ Bamboo that’s gentle on sensitive or eczema-prone skin U-shaped double zipper for easy diaper changes and optimal comfort Seasonless fabric keeps them cool in the summer & cozy in the winter Fold-over mittens (up to size: 12-18 months) for scratch-free sleep Fold-over foot cuffs (on all sizes) easily convert from footless romper to footed sleeper No snaps, buttons, or interior tags Fits up-to-3x longer than the average sleeper Safe for newborn dressing without anything to irritate healing belly buttons