That is silicone-based mostly so There are plenty of brands, you can choose one of these for making a silicone mask. With this mold There are 2 sides: the 1st side is your character and the second side is your mask format. The Hollis M1 Mask provides the entire options https://silicone-mask-realistic-u95059.blogscribble.com/28523517/examine-this-report-on-m3-gas-mask-history