Medium 20" EXTRA FRESH 3 Knot Tug. Mammoth Flossy Chews EXTRA FRESH are made with mint and natural beeswax floss to help freshen breath and control tartar while pets enjoy hours of interactive playtime. Perfect for maintaining good dental hygiene while playing, tossing, and tugging. Toss. Tug. Floss. Great for small to medium size dogs.