XL 36″ Cotton-Poly Color 3 Knot Rope Tug. Mammoth Flossy Chews are made from premium quality cotton-poly 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. Toss. Tug. Floss. Great for large to extra large size dogs.