BRILBE M size, 100% cotton mesh This is a swaddle similar to the Swaddle Up. It's a cool mesh type perfect for summer, and the size is M. Since it's the type where the hands can come out, it's also perfect for graduating from swaddling. I received this from someone else and used it for about a month. There is some wear and tear, so please check the photos for the condition. Summer Mesh Cool Swaddle Swaddling blanket