Stretchy fabric is a type of fabric that is elastic and can be stretched to fit the body. Lycra, KNIT, spandex, tricot, and stockinette are all examples of stretchy fabrics. Lycra is a synthetic fiber that is lightweight and durable. KNIT is a type of fabric made from interlocking loops of yarn. Spandex is a synthetic fiber that is known for its elasticity and strength. Tricot is a type of KNIT fabric with a smooth, flat surface. Stockinette is a type of knitted fabric with a smooth, even surface.