These baby hats are about as comfortable and cozy as you can get! Inspired by the full head coverage and chin strap of vintage aviator style hats, these infant hats are fully lined with super soft fleece to keep your babys head warm this winter. The outside is a brilliant, multi-colored and multi-patterned knitted cotton. Proudly crafted with care and made in America with recycled cotton yarn. (Small: 6-12 Months Medium: 12-24 Months)