It's made of a fluffy material like fleece. I think you can wear it until around spring. I bought it used, but the condition was great and I was very satisfied! I'm selling it because my child has outgrown it. ⚠️This is a used item. Please understand. ⚠️I have a small child, so it may take some time to ship. Please let me know if you're in a hurry, and I will do my best to accommodate you. ⚠️I will consider price negotiations if you provide your desired price. *I will not respond to generic price negotiation messages. I am committed to a smooth transaction, so thank you for your cooperation (^^)