Glows in the dark. The shield is curved for comfort and good for the skin thanks to generous air holes and MAM" patented inside surface. The knob is easy to take hold of, never a bother. MAM"s patent- pending Silk Nipple is silicone with a difference: it"s silky soft. No other silicone feels softer. Thanks to the anti-slip surface the soother stays easily in baby"s mouth. The orthodontic MAM nipple is ideal for baby"s jaw and teeth development. It individually adapts to baby"s mouth. MAM soothers are always in the right position. BPA free.