Sublimation transfer. Light colored shirts and white shirts are best for sublimation. Darker shirts such as grey will not show the design as well. Garment must be at least 50% polyester. 100% polyester items will give you the best colors. Anything less than 50% will give the design a vintage look. Must have a heat press for this process. No transfer sheet is needed. Medium Pressure 385-400 degrees 45-60 seconds HTV transfer 315 for 30 seconds cool peel. Medium Pressure Please allow 3-4 business days for orders to be completed and shipped.