This is silicone-dependent so there are a lot of manufacturers, you could pick one of these for making a silicone mask. Hold them from sunlight and fluorescent lights. In case the mask gets distorted (don't forget latex is really a all-natural product) utilize a blow drier within the reduced-warmth setting. https://silicon-masking-size-m399641.blog4youth.com/29085260/5-simple-techniques-for-silicone-laryngeal-mask-price