The most popular t-shirts for screen printing are typically made from cotton, as it is a breathable, comfortable, and durable fabric that can hold the ink well. Here are a few popular t-shirt styles that are commonly used for screen printing:

100% Cotton T-Shirts:

These are the most popular and widely used t-shirts for screen printing. They are made from high-quality, soft, and durable cotton, and are available in a wide range of colors, sizes, and styles.

Cotton/Polyester Blend T-Shirts:

These t-shirts are made from a blend of cotton and polyester fibers, which makes them more durable and wrinkle-resistant than 100% cotton t-shirts. They are also more moisture-wicking which makes them suitable for sports or athletic events.

Unisex T-Shirts:

These t-shirts are designed to fit both men and women, and are available in a wide range of sizes. They are suitable for a variety of events, from casual to corporate.

Heavyweight T-Shirts:

These t-shirts are made from thicker cotton fabric and are ideal for screen printing bold and bright designs. They are perfect for outdoor events and for colder weather.

Long Sleeve T-Shirts:

These t-shirts have long sleeves and are suitable for cooler weather, and for events where a more formal look is required.

It is important to note that the choice of t-shirt depends on the design, the event, and the target audience. T-shirts made from 100% cotton are the most popular for screen printing as they have a soft texture, absorb ink well and are comfortable to wear.