Twill is one of the three major types of textile weaves, along with satin and plain weaves. The distinguishing characteristic of the twill weave is a diagonal rib pattern. Twill weaves have a distinct, often darker colored 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 colored yarns can be used to achieve designs like tweed and houndstooth. The fabric is durable with a beautiful drape, and it is used for denim, chinos, upholstery, and bed linens.