Through extensive research and clinical trials philips avent products work effectively together to promote babys well being and give you the flexibility to care for a growing baby the ultra soft philips avent nipple protectors are made of ultra fine soft odourless taste free silicone that protects sore or cracked nipples during breastfeeding protects sore nipples during breastfeeding nipple protectors are only designed for use when you have sore or cracked nipples and should be used wit