Perfect to keep baby warm all throughout the night and for day time naps. Easy access snaps at shoulder and along both sides for no fuss diaper changes. Reversible jacquard design allow you to switch up the look. Universal size for longevity (3-18mo. or up to 25lbs.) Open bottom allows for no height restrictions. Breathable open bottom access for ventilation. 100% premium cotton fabric with breathable muslin fabric for warmer nurseries.