Stretch material is a type of fabric that is elastic and can be stretched to fit the body. Lycra is a brand of stretch material, which is a synthetic fiber made from polyurethane. It is lightweight, durable, and resistant to wrinkles and fading. Lycra is often used in clothing such as swimwear, activewear, and lingerie, as well as in upholstery and bedding. It is also used in medical compression garments and orthopedic braces.