By MSA. A new clear blue facepiece subtracts 25% of the weight and adds noticeable softness to MSA’s popular Advantage half-mask respirator. The unmatched fit and comfort start with a soft, pliable combination of rubber and plastic that provide a virtually customized fit. These are key components in the patented Multiflex® system that equalizes face-seal area while delivering exceptional stability. The respirator will not collapse during wear.