Application: This mouth mask is perfect for running, cycling, hiking or other outdoor activities, it's also suitable for daily use
Provide protection: The cotton masks protects you from dust, wind, pollution, smoke, etc.
Material: The anti dust mask is made of cotton material, making you breathe freely for outdoor
Size: Folded: L*W: 10*12cm(3.94*4.72in), strap length 8cm(3.15in)
Stretchy: Elastic strap makes it easy and comfortable to wear, which won't crack and won't hurt your ears