Zen Sack® Quilted 2-Pack

"The first night using this my 4 month old went from sleeping 3 hours to a full 8!" -Lauren M. About Safety Size Fabric Details & Care - Close-stitched quilted texture for cool weather comfort- Cozy 1.0 TOG for added warmth- Cotton poly-fiber fill - Two-way zipper makes diaper changes a breeze- Zipper covers, cuddly seams and soft tags protect your baby’s skin- Grow-with me adjustable snaps- Can be worn backwards by tummy sleepers who can roll independently- Sizes from 0 to 24 months - Gently weighted, designed to mimic your touch- Applies gentle pressure no more than a human palm or car-seat chest clip- Passes mandatory children's product tests- Hip-healthy. Does not hinder mobility Small:- Age: 0-6 months - Weight: 7-18 lbs / 3-8 kgs - Height: 21-30 inches / 53-76 cms Medium:- Age: 6-15 months - Weight: 16-26 lbs / 7-12 kgs - Height: 26-33 inches / 66-84 cms Large:- Age: 15-24 months - Weight: 26-36 lbs / 12-16 kgs- Height: 31-38 inches / 78-96 cms * When determinin