The Blocker is the best heat transfer for: Fabrics that bleed: Any garments you think might have unstable dye and bleed color. Patterned polyester fabrics: Shirts, sportswear and more where there is a pattern already on the fabric. Sublimated polyester fabrics that bleed: Colored fabrics that were dyed using heat-to-transfer dye onto the polyester. What makes it different It creates an impenetrable layer beneath the print, creating a true no-bleed result. The screen printed white backing makes the colors more vibrant on light and dark colors Rebounds without cracking when stretched Our 7-color printing presses match colors with insane accuracy, so you get consistent colors, every single order – and you can PMS color match You can also print metallic colors at no extra cost. Check out this page for details. It's a hot peel heat transfer so you can work Supafast and Supaeasy Made with OEKO-TEX Standard 100 water-based ink so it's better for the planet