Product Details Type: PUFF Screen Print Transfer Size: 12" X 8" Mock-Up: Gildan 5000 Sport Grey Formula:HIGH HEAT FORMULA HIGH HEAT FORMULA PRESSING INSTRUCTIONS ** Recommended for 100% Cotton Shirts, if polyester is present thread the shirt or place parchment paper inside to prevent any transferring through the shirt ** HIGH POLYESTER material is NOT recommended for these transfers. These REQUIRE AN ACCURATE PRESSURE AND TEMPERATURE, they are a much softer transfer, but are not as user friendly as the low heat formula. YOU MUST USE A HEAT GUN TO TEST THE ACCURACY OF YOUR PRESS PRIOR TO PRESSING. 350 degrees; IF YOUR USING A BUDGET PRESS (UNDER $600) we recommend increasing your heat by 10-20 degrees. HEAVY PRESSURE 8-9 PSI. Pre press for 7 seconds to remove wrinkles and moisture; Press for 7-12 seconds; HOT PEEL. No teflon, covers, pillows; you MAY need to make an exception AND USE A PRESSING PILLOW if you have problems obtaining a high enough pressure setting.