Twill is a type of textile weave with a pattern of diagonal parallel ribs. It is one of three fundamental types of textile weaves along with plain weave and satin. An incredibly versatile fabric distinguishable by diagonal ribs on its face, and a soft, smooth finish. Twill weaves have a distinct, often darker coloured front side (called the wale) with a lighter back. Twill has high thread count, which means that the fabric is opaque, thick, and durable. Twill fabrics are rarely printed on, though multiple-coloured yarns can be used to achieve designs like tweed and houndstooth.