Specialty Materials - ThermoSPORT - Athletic YellowSports jerseys call for a thicker heat transfer vinyl, and Specialty Materials ThermoSPORT delivers! ThermoSPORT being thicker allows it to maintain its shape with the open gaps found in most jerseys. When you need to press a jersey, grab your ThermoSPORT! ThermoSPORT is a durable and thick HTV. Its also designed for pressing quickly at lower temperatures! Worry no longer about dye migration the quicker press and thickness helps to block dye