Our weighted sleep sack is Scientifically designed for self-soothing and sounder sleep. The gently weighted Zen Sack Classic calms like your embrace by providing comforting pressure only where babies are naturally held. This secure feeling eases the swaddle transition and helps babies self-soothe through sleep disruptions, leading to deeper periods of sleep that are essential for healthy development. The gently weighted Zen Sleep Sack helps your baby sleep through every sleep phase. Designed to help babies self-soothe and fall asleep independently, the Zen Sack eases the transition from swaddle to sack, and prevents sleep regressions and disruptions: An essential for sleep training. ▪ Two-way zipper makes diaper changes a breeze ▪ Zipper covers, cuddly seams and soft tags protect your baby’s skin ▪ Can be worn backwards by tummy sleepers who can roll independently ▪ Grow-with me adjustable snaps ▪ 0.5 TOG comforts in all weathers Previously worn but still plenty of love left. No stains, tears or holes.