Scientifically designed for self-soothing and sounder sleep. The gently weighted Zen Sleep Sack helps your baby sleep through every sleep phase. Designed to help babies self-soothe and learn to fall asleep independently, the Zen Sack eases the transition from swaddle to sack, and prevents sleep regressions and disruptions: "A sleep training essential".  

Features: 

• 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  

Safety: 

• Mimics your reassuring palm and calms with only a few ounces 
• Applies gentle pressure that is tested for breathing safety 
• Adheres to all known CPSC safety requirements 
• Tested for suffocation hazard, pulmonologist verified
• Hip-healthy. Does not hinder mobility
• The safer alternative to all-weighted blankets