Floriani Water Soluble Topping provides a smooth stitching surface for your machine. When the embroidery has to maneuver around loops and grooves in the fabric, it will affect your stitch quality. This product is completely water soluble and provides fantastic stability on the surface of your fabric by keeping your stitches elevated. Use on high pile fabrics such as fleece, terry and towels Use on textured fabrics such as corduroy, seer sucker, and velvet. Use on knits and lycra/spandex. Use to shield some fabrics from hoop burn Once opened, keep Floriani Water Soluble Topping sealed in an airtight ziplock type bag or Tupperware/Rubbermaid type container.