Sturdy cloth is a term used to describe fabrics that are strong and durable. Three of the most common types of sturdy cloth are JEAN, DENIM, LINEN, and TWILL. JEAN is a cotton fabric with a TWILL weave, usually dyed blue or black. DENIM is a type of JEAN fabric that is often used for clothing. LINEN is a fabric made from the fibers of the flax plant, which is known for its strength and durability. TWILL is a type of fabric weave that is characterized by diagonal parallel ribs. All of these fabrics are considered to be sturdy cloths, and are often used for clothing and other items that require strength and durability.