About this item Merino Kids Standard Weight Go Go Bag is an international award-winning baby sleep bag which is designed with the safety and comfort of your baby in mind. It uses only 100% superfine merino wool on the inside & 100% GOTS certified organic cotton outer. The natural ability of superfine merino wool allows the skin to breathe and regulates body temperature year-round, so baby won't overheat or wake up cold - perfect for all seasons and environments For parents who want the very best. Crafted by master tailors from luxuriously soft Superfine Merino wool. 100% natural, itch-free and allergy-safe. Temperature Range: 64 - 86 degrees Fahrenheit. TOG rating 0.5 - 1.8 Machine washable. YKK zip opens from the bottom for easy nappy changes. Travel vent for easy transfer from stroller to the little one's cot. No need to use sheets or blankets which can disturb a childâ€s sleep when it wriggles free or gets tangled up. Simply add merino base layers for extra warmth if required First sleep bag in the world to achieve the stringent UK BSI standard for baby sleep bag safety, and the only merino sleep bag certified to this safety standard. Baby has freedom to move yet can't slip underneath or wriggle out. Fits babies 2-4 years safely and comfortably. Innovative safety belt aperture makes it easy to transfer sleeping baby between car seat, stroller and nursery to maintain sleep routine.