Hey pet lovers! I encourage all of you to go check out our website, www.buttersbrand.com. We created the product over a decade ago, when our dog, Butter, became handicapped. Our product is made of 100% polyester polar fleece and can be used on all surfaces. Our drag bags are one of a kind because we are team pet, we found a way to make sure our product caused no strain on the pets body. Check our our website for more information! Please contact us with any questions you may have.