Medium 20in Denim Rope 3 Knot Tug with 3in Ball. Mammoth Flossy Chew Denim Rope Toys are made from premium denim materials in fun shapes dogs love. The denim materials floss dogs teeth as they chew and play. The added Tennis Ball is excellent for chewing. Great for tugging. Perfect for medium sized breeds. Great for strong chewers. Play time is an important part of bonding between dog and owner. This toy is perfect for interactive playing & creating the positive play experience with your dog!.