Heat Transfer Letter Set: Design your own designs on clothes, t-shirts, sweaters, bags, hoodies, hats, and various other items. Share them with friends or family and enjoy the fun of crafting together. High-Quality Materials: Iron-on vinyl letters are made of high-quality PU material that resists breaking or tearing and exhibits excellent elasticity. Iron-on letter patches retain their color and shape, preventing color bleeding. The iron-on numbers are washable and will not fade or deform after repeated machine washes. Washable and Durable: Heat transfer letters use an anti-sublimation process. During the heat transfer process, heat and pressure separate the protective and graphic layers from the polyester base, making them durable and hard-wearing, and allowing them to retain their original shape and color after repeated washes. Easy to Use: To apply these iron-on letters to clothing, select the desired letter or symbol and place it on the garment. Then use a heat transfer device or an iron to iron the letters for approximately 10-15 seconds at 140-160 degrees Celsius. Please note that the black, matte back of the numbers and letters is the reverse side, while the front is smooth. Widely Applicable: These iron-on letters or symbols for shirts can be ironed onto various garments, such as t-shirts, bags, sweaters, or sports uniforms. You can use them to create meaningful words or phrases, print them on your clothes, and match them with outfits for couples or families for daily use. You can also use them as gifts for family or friends. Please note: 1. Please allow a deviation of 1-3 cm due to manual measurement. 2. Due to differences between monitors, the image may not reflect the actual color of the item. Thank you for your understanding.