A special mask for a special HTV! If you have EasySubli HTV, the sublimation vinyl for colored polyester and cotton garments, you will probably need the silicone mask to transfer designs. The EasySubli mask is different from any other Siser transfer mask but the masking process is similar. Use a spatula to stick the mask and printed HTV together to keep multiple pieces on and applied at once. However, the mask is specially designed to work with EasySubli and sublimation inks for easy heat application.