Regularly cardigans are open fronted and have catches or a zipper: pieces of clothing that are tied are rather viewed as a robe. A current style pattern has the piece of clothing without any catches or zipper and balances open by design.[citation needed] By contrast, a sweatshirt (or sweater) doesn't open in front however should be "pulled over" the head to be worn. It could be machine-or hand-sewed. Generally, cardigans were made of fleece however would now be able to be made of cotton, manufactured strands, or any mix thereof.