G1 Wonder Stylo Masks features the WORLD's FIRST ‘Graphene Silver Nanotechnology' inside which DESTROYS >99% of Viruses and Bacteria in seconds. - Graphene Membrane is certified by NABL and government approved laboratories. - Extremely Breathable - Can wear for Long Hours - Snug Fit Design for Maximum Comfort - >99% - BFE - Bacterial Filtration Efficiency - >99% - PFE PM 2.5 Particle Filtration Efficiency - Washable and reusable upto 30 times gentle washes - Anti Pollution Design Features: - Wonder Mask has been designed to provide maximum comfort along with protection - Adjustable Ear Loops for comfort Adjustable Head Loop for support which minimize the pressure on ear - Nose pin to minimize fogging on glasses / spectacles / goggles - G1 Wonder Stylo Mask is made of 4 Layers: Outer Layer - 3D Air Mesh for filtering coarse particles 2nd Layer - NM Graphene Silver Membrane 3rd Layer - SSMMS Fabric Inner Layer - 100% Cotton.