Description from website: WagWellies® Mojave is our hot and dry weather boot. Designed to protect paws from the hazard of hot pavement. The perforated holes allow lots of ventilation. Our patented design makes them easy to slide off and on, while also creating a secure fit that will stay put even while on the run. Sleek, sturdy, and, most importantly, comfortable, making for the perfect paw protection. Sold as a set of 4. *Only tried these on my pup one time (inside and on carpet). I have provided a photo of the bottom of each bootie to show they have not been used.