Features:-With its unique reverse zipper construction, this sleeping bag allows for quick and discreet diaper changes without waking baby-Exceeding international safety standards, the sleeper will quickly become the most practical piece of clothing for baby's nights-0.7 TOGS: Room temperature 23-27 Celsius / 73-81F 0-6 months: For babies weighing 4.5 to 7 kg / 10 to 16 lbs and measuring 23" to 26"6-18 months: For babies weighing 7 to 11.8 kg / 16 to 26 lbs and measuring 26" to 34"18-36 months: For babies weighing 11.8 to 18 kg / 26 to 40 lbs and measuring 34" to 40" Composition: 100% cotton muslin