Perfect for fall and winter! Around 2-3 months, after baby has transitioned from swaddling, experts recommend a wearable blanket for sleep. The zzZipMe Sack features a handy 2-way zipper that makes our sleep sack easy to use. TOG 1.5 Easy to place baby in the sack when unzipped from the top and keeps baby warm during diaper changes when you zip up from the bottom. Award winning design features plush fabric inside and out. Available Sizes: 0-6 Month: Fits up to 28 inches (71 cm) 6-12 Months: Fits up to 32 inches (81 cm) 12-18 Months: Fits up to 36 inches (91 cm) Highlights: Our cozy Soft Fleece zzZipMe Sleeping Sack is a soft wearable blanket. Features a 2-way zipper – easy to place baby in sack and easy access for diaper changes. Tog rating of 1.5. Coordinates with a variety of our quality baby essentials. 100% Microfiber Designed in Seattle Black & White, Modern Essentials, Fall & Winter, Modern Baby