The 0.5 TOG sleeping bag has no fill for a better sleep in warmer temps. This sleep bag was a gift and was never worn as my baby was born in the colder month. Pattern is so cute. Certified OEKO-TEX® Standard 100 Hypoallergenic, breathable, wicks moisture Ultra-soft 95% bamboo viscose, 5% spandex WONDERZiP keeps the diaper change so easy.