Almost unbreakable on any type of contact point. Easier to insert with less force (and risk of tissue trauma) even on sharp or rough contacts! Made from super fine multi-filaments that produce a "scrubbing" action. Superb strength and break resistance, even on corroded amalgam contacts or sharp edges! Piksters Fluoride Floss 30 metres is made from super fine multi-filaments that produce a "scrubbing" action when used.