This is Heat Highbon (100% polyester), which can be used to melt the edges of patches with a soldering iron. It is an embroidery backing paper that can be heat-cut when making patches. The product name is Highbon. It has adhesive on one side and can be ironed on. The size is approximately 100cm x 100cm. The thickness is normal. It will be folded for Yu-packet shipping, which may cause creases. Also, because thread is used, thread may adhere to it.