The product is a lot of 13 rolls of Siser EasyWeed Electric HTV vinyl, specifically designed for use on t-shirts. Each roll measures 11.8" x 36", providing a generous amount of material for various crafting projects. The EasyWeed Electric HTV is a high-quality, flexible material that is ideal for creating custom designs on clothing and other fabrics. With the brand being Siser, known for their commitment to quality and innovation in the crafting industry, this product is sure to meet the needs of crafters looking to add unique and personalized touches to their projects.