Although our leggings fit most pooches paw-fectly, they slip off some pups’ paws. To guarantee Walkee Paws work for all shapes and sizes, we created Elastic Velcro Boot Straps! Designed to comfortably sit around your dog’s ankles, these adjustable velcro straps keep booties in place for super secure paw protection.They come in 2-packs - mostly needed for back legs or you can buy 2 sets for all paws. Choose the size that matches your leggings.Note: Sizes M and L come with velcro straps on back boots as this is where they are most needed.