Goumi slumber sack.Essential organic cotton and bamboo sleep sack made with luxuriously, Our cozy sleep sack is designed to create a microclimate around your baby that helps maintain a consistent temperature for peaceful slumbers. Breathable, hypoallergenic fabric is suitable for year-round use and ideal for most indoor temperatures (68- 74°F).  Asymmetrical zipper all the way around that helps fit made simple and quick and simple diaper access •  For safe sizing, your baby’s head should not be able to slip through the neck opening once fastened. - WARNING! Do not use it if your child can climb out of a cot. Do not use in combination with other bedding items.linen sleep sack