Form Fit is made of a hydrogel material that expands into a soft, pliable, gelatinous material when it contacts tear film. As it hydrates, it increases in size until it completely fills the vertical canalicular cavity. It takes approximately 10 minutes for the plug to become completely hydrated. Plugs come pre-loaded on a user-friendly inserter. Manufactured by Oasis (part number 6303). Comes 2 plugs per box.