Definition: Allstate Leather: Allstate Leather is a high-quality, durable leather that has been treated to ensure it's resistant to wear, tear, and general friction. It can be used in many different applications, such as car seats, backpacks, bags, and more. The term "allstate" refers to the manufacturer of the product, Allstate Motor Vehicle Insurance Company. Definition: - Allstate Leather is a type of high-quality leather that has been treated to ensure it's resistant to wear, tear, and general friction. It can be used in many different applications, such as car seats, backpacks, bags, and more. - The term "allstate" refers to the manufacturer of the product, Allstate Motor Vehicle Insurance Company.