It can be a blanket, or half blanket. No arm holes! They are much more comfortable, and practical than you can imagine. Their only drawback is the trouble to get one on, and arranged like you want. They require a belt, or sash, to keep them in place. Once in place though, you have the option to drop the upper part if you get too warm. The way the blanket sets on you gives you the option of a head cover. Aside from the belt, they work best with an upper closure, such as some form of a pin, or such. I would say a celtic blanket pin, but those are not correct for 18th c., if that matters to you.