• FILTER POCKET: Interior pocket fits PM2.5 carbon filter. Makes it easy to insert extra layers such as tissue, paper towel or cotton fabric if filters are not available.
  
  
• MADE OF COTTON & ADJUSTABLE STRAPS: Made of high-quality ultra-soft cotton material with adjustable elastic straps and nose bridge to prevent slipping and ensure a secure fit. Adjustable straps enabling use for both adults and children.
  
  
• EXHAUST VALVE: Exhalation valve helps to breathe smoothly and also to release the build-up of moisture and CO2.
  
  
• WASHABLE & REUSABLE