The sleeves are made of a shirt material and are wide. It's a size S, but it has a relaxed fit. The yellow "16" on the number is cracked from the beginning. The lining is brushed fleece, making it perfect for this time of year when it's warmed up but still a little chilly. Although it's unused, it has been stored at home for a while, so please check the photos before considering a purchase. Thank you for looking.