Their initial prototype was developed using WHOLEGARMENT and went through some fit tests. After carefully hearing feedback from surgeons and doctors, they updated the mask with a better fit that contours to the face with a tie-back to improve fit for all-day wear. This new mask also features a pocket to insert filtration fabric so the outer body can be washed and reused. They decided to proceed with HEPA Grade fabric to insert as the lining fabric for filtration purposes.