A heat press is a machine used to transfer designs onto various materials, primarily fabrics. It uses heat and pressure to apply a design, typically made from vinyl or sublimation ink, onto items like t-shirts, hats, and bags. The process ensures that the design adheres firmly and lasts through multiple washes. Heat presses come in different types, including clamshell, swing-away, and cap presses, each suited for specific applications. They are popular in the custom apparel industry and among hobbyists for creating personalized items. Proper temperature and pressure settings are crucial for achieving high-quality results.