It’s a challenge to make a filter media that maximizes airflow but also blocks enough airborne particles to meet NIOSH standards. We started with the world’s best melt blown filter media equipment – from Germany’s Reifenhäuser REICOFIL GmbH & Co – and engineered it to produce the optimal balance of fiber size, thickness, weight, and proprietary static charge to meet this challenge. The result is Shawmut MB, a filter media other mask manufacturers are coming to us for due to its high filtration properties, low air resistance, and light weight.