- ????4-layer structure: 3-layer premium cotton + 1 filtration layer; layers are soft and comfortable, breathable
- ????3D design: the extra triangle chin holder at the bottom cups the chin and prevents it from shifting around
- ????Adjustable ear loops and nose wire for a snug fit and enhanced security
- ????Filter pocket included for adding extra protection
- Free shipping from the USA: arrives in 3-5 days and faster than the estimated time