Large 14in EXTRA FRESH 2 Knot Bone. Mammoth Flossy Chews EXTRA FRESH toys are specially formulated with real mint dental floss and dipped in Beeswax to freshen breath and control tartar while playing, tossing and tugging. These toys are perfect for maintaining good dental hygiene while enjoying an interactive play experience. Rope fibers floss dogs teeth as they chew and play.