XL 36" 100% Cotton White 3 Knot Rope Tug. Mammoth Flossy Chews are made from premium 100% cotton yarns ideal for interactive playing, tossing and tugging. Flossy Chews dog toys encourage playtime and bonding between you and your pet while helping to maintain good dental hygiene. Biodegradable. Toss. Tug. Floss. Great for large to extra large size dogs.