Polyester Rayon weft spandex Twill Fabric bottom weight Polyester Rayon weft spandex twill fabric is a type of fabric that is commonly used for bottom weight garments. It is a blend of polyester, rayon, and spandex fibers, which gives it a combination of durability, softness, and stretch. The twill weave gives the fabric a diagonal ribbed texture, adding to its strength and durability. Bottom weight fabrics are typically used for pants, skirts, and other garments that require a heavier weight fabric to provide structure and drape. This type of fabric is popular for its comfort, versatility, and ease of care.