2-4 years The outside is in great shape with no discolorations or snags. The inside has a few small snags (not holes) that are pictured. Nonsmoking pet friendly home. From the Woolino website….. Are you worried about which weight baby sleep bag to use and whether your baby will be too hot or cold while sleeping? With Woolino, there is no need to worry. The exceptionally breathable Merino wool naturally regulates baby's body temperature, which helps your child to sleep safely and comfortably through the night. It gives you peace of mind and a good night's sleep as well. This amazing baby sleeping bag also saves you buying different sleep sacs for different seasons because you can use it year-round. FEATURES & BENEFITS Premium Natural Fabrics: silky soft Australian merino wool lining & organic cotton outer Can be used in all 4 seasons - suitable for room temperatures 63-75F (17-24C) Merino wool regulates body temperature unlike any other fiber, keeping baby warm when it's cold and cool when it's hot Two-way zipper for easy dressing and diaper changes Zipper guards to protect child's skin and to discourage child from chewing on the zipper Woolmark certified merino wool; GOTS certified organic cotton; All the fabrics and accessories are OEKO-Tex 100 certified (tested for 100 harmful substances)