THIS IS NOT HTV, THIS IS MASK FOR USE WITH HTV! A special mask for a special HTV! If you have EasySubli HTV- the sublimation vinyl for colored polyester and cotton garments- you'll likely need the silicone mask for transferring designs. EasySubli Mask is unlike any other Siser transfer mask, but the masking process is similar. Use a squeegee to bond the mask and printed HTV in order to keep multiple pieces alighed and applied at once. However, the mask is specially forumlated to work with EasySubli and the sublimation inks to achieve an easy heat application.