The purpose of Survivor Sport Floor Rolls is to provide the maximum durability required to endure the abuse of a free weight area. The rolls can be trimmed to match your workout space; they are 15 feet long. Recycled rubber is used to make rolls, which offer the durability and cushioning required for a secure and enjoyable workout. Additionally, the rolls act as a naturally occurring vibration and noise dampener. The rolls have beautiful specks in a variety of colors that are dispersed at random. Gray-black in color.