GUM Expanding Dental Floss 4yds, 144/Bx. Premium Floss - Lightly waxed for easy insertion between teeth, expands during use to clean wider gaps and clean more tooth surface. Exceptionally Gentle: Texturized nylon fibers are gently on gums and are ideal for patients with tooth and/or gingival sensitivity or gingival recession. Easy to Insert even between the tightest contacts. 144 dispensers of 4 yards floss