These pacifiers are softer than conventional ones made of plastic or silicone. They are extremely hygienic because they are molded in a single piece, with no joints or cracks where dirt and bacteria can accumulate. They have a larger shield than conventional pacifiers, which prevents babies accidentally getting the entire pacifier into their mouths. Unlike conventional pacifiers, these won’t leave marks on baby’s face. Because of their natural qualities, they should be replaced every 4 to 5 weeks.