Are you worried about which weight baby sleep bag to use and whether your baby will be too hot or cold during sleep? With Woolino there is no need to worry because exceptionally breathable merino wool naturally regulates baby's body temperature to ensure that the candidate can comfortably and safely accommodate through the night. This luxurious baby sleeping bag will also save money by buying lots of other brand sleep sack size and tog ratings because it comes in a universal size that will fit kids 2m - 2 years of age and can be used all year round. This is the best and only one child wear blanket that you will need until your baby turns into two. 100% NATURAL - Silk soft Australian merino wool lining and organic cotton outer One universal size, 2mo-2 yrs. For younger children, simply close the underarm snap to adjust the fit. Can be used in all seasons - suitable for room temperature. 63-77F (17-25°C). Unlike any other fiber, merino keeps the baby's body temperature warm in cold weather and cool in hot weather. Reduces the risk of overheating - a risk factor for SIDS. Puller guards to protect baby's skin and prevent baby chewing the zip pull. Opens completely flat for easy preparation. Machine washable. Nursery thermometer with seasoning guide included. Meets all CPSC child safety requirements. Woolmark Merino Certification. OEKO-Tex 100 certified fabric and accessories also available in child size 2-4 years why Merino? Medical studies have shown that babies sleep in merino wool settle faster, wake up and cry less, sleep longer and gain weight faster. Significantly thinner than