Disana Boiled Wool Sleeping Bag - wearable blanket.  GOTS certified organic. Made in Germany. Size 1, 60 cm, for about age 1 - 7 months  Color: grey This is boiled wool - which is much more substantial and weighs more because it contains a lot of wool.  The weight is just right for both warmth, breathability and a feeling of security. Soft and lovely boiled organic fine merino wool outside. Soft organic cotton inside. Warmth and comfort. The warmth of boiled wool is not at all like sweaty polyester. Wool breathes and regulates body temperature. The top of the zipper is very well covered by organic cotton, which makes good sense. Handwash only. We loved this sleep sack and helped our baby sleep so well. Wish I knew about these for my older kids. smoke free, pet friendly home.