Expressions Vinyl - 12in. x 15in. Stripflock Heat Transfer Vinyl Collection (12 Piece Set) StripFlock Heat Transfer Vinyl Collection 12 Sheets - Includes one sheet of each color offered in our StripFlock heat transfer vinyl series StripFlock gives logos a raised, textured, suede-like feel. Compatible with ALL craft cutters StripFlock by Siser is the only flock in the industry that can be layered on itself!