Almost brand new! My son took one nap in it after a bath before we decided it's a bit too heavy for our needs. Exceptionally soft organic cotton with a polyester fill, two-way zip for easy nighttime diaper changes, and hand pockets to keep your baby's fingers warm! Fits ages 6-18 months From their website: Kaiya Baby Winter Zip Sleep Sack With Sleeves are made of 100% organic cotton. 3.5 TOG can give babies better warmth on cold winter days.