Application: The Teflon cushion can be used in 2 ways. Either it is underneath the clothes if the back of the clothes is very even, otherwise the pillow can be fitted inside the clothes, which should be done especially if the surface is uneven. The heat pad smooths materials and makes a stronger backing on the material compared to the normal heat press silicone pad can perform. Examples on surfaces: Even surface (heat pad at bottom): T-shirts, non-zippers, buttons and pockets. Uneven surface (heat pads put inside the clothes): Jackets / Trousers / Poloshirts / Shorts / Zippered Overalls , buttons and pockets