Teeshirtsrock.com offers a variety of T-shirts, and the composition can vary depending on the specific style and design. Some T-shirts may indeed be made of 100% cotton, which is popular for its softness and breathability, while others might incorporate blends with materials such as polyester or rayon for added durability or stretch. It is important to check the product description for each T-shirt to confirm the fabric composition before making a purchase. This information is typically available on the product page. If you need more specific details regarding certain items, visiting the current web page might be helpful, as it can provide further clarification on fabric content and care instructions.