Carhartt Kids' Brown Sherpa Lined Bubba Hat, One Size. Hunting season or morning chores, this sherpa-lined hat for little kids is designed with cold weather in mind. It has a lightweight polyester exterior and a plush fleece lining. Extended chin straps secure it in place and add warmth. 100% polyester fleece. 100% polyester sherpa lining. Chin strap with hook-and-loop closure.