The Moldex EZ-ON 23 N95 is designed with a one strap head harness that can be quickly put on and taken off. The one strap design can be easily adjusted for a custom fit. This one strap design is the first and only to be approved by NIOSH for the N95. The strap is made of cloth so it stays cooler against the skin than rubber straps. This respirator comes with Moldex’s exclusive DuraMesh shell which keeps the filter media cleaner longer and helps the respirator holds its shape. It even resists collapsing in hot and humid conditions. A Ventex valve lets hot air out more quickly to keep workers cooler and to lower breath resistance.