Silicone has enhanced comfort and durability with higher resistance to heat and compression. Sleek design for modern, high-tech look and increased worker acceptance. Lightweight design plus extra-wide sealing area provides all-day comfort. Low profile, compact design fits well under welding helmets and with safety glasses. Mask drops down for convenient storage around the neck or locks down for custom fit. Adjustable head cradle and curved neck buckles for extra comfort. Wide field of vision. Maintenance made simple with very few replacement parts. 100% PVC-Free.