The product is a set of 600 Cardboard Gold soft penny card sleeves designed to fit 3x4 top loaders. These clear sleeves are made of polypropylene material, providing a soft and durable protection for standard-sized trading cards. Each sleeve can hold one card with 20 pt. thickness, making it perfect for storing and displaying sports trading cards. The brand, Cardboard Gold, is known for producing high-quality card sleeves, and this product is manufactured in China.