Features:-With its unique reverse-zip construction, this sleeping bag allows for quick and discreet diaper changes without waking baby-Exceeding international safety standards, the sleeper will quickly become baby's most practical nighttime garment-2.0 togs: Room temperature 16-20 Celsius/61-68 F 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: Shell: 100% cotton. Lining: 65% polyester, 35% cotton. Filling: 100% polyester