100% silicone. Soothes & calms baby better (Based on Market Research, June 2013, tested with 110 Nuk pacifier users). 100% baby approved orthodontic shape. BPA free. Naturally fits baby's mouth for healthy oral development. Unique Nuk Orthodontic Shape: 1. True orthodontic shape nipple - naturally fits baby's mouth. 2. Integrated channels - less palate pressure. 3. Scoop nipple cavity - maximizes tongue movement. 4. Heart-shaped shield - prevents irritation. Safety instructions inside. Nuk-USA.com. Made in USA.