ThermoFlex Plus Metal Flake is a durable polyurethane based heat vinyl that is highly flexible. The Metal Flake has small pieces of glitter within the vinyl and feels smooth to the touch. It has a soft hand and strong grip and if applied properly will outlast the life of the garment. It is available in large variety of colors with a matte finish and 6 colors with a glossy finish and 6 metal flake colors to match all your popular sports teams. Most colors of ThermoFlex Plus vinyl may be applied in layers for multi-colored designs, with the exception of the neon colors, Antique Silver, Old Gold, Metal Flake colors and Columbia Blue. These colors cannot have layers adhered on top of them, although we have successfully layered these products on top of other colors. Please Note: ThermoFlex Plus will NOT adhere to nylon. Be advised that dye migration has occurred with low energy dyes in polyester and poly-blend fabrics.