Perfect for running, cycling, hiking or other outdoor activities, it's also suitable for daily use.

Features:

• Provide protection: The cotton protects you from dust.
• Material: The anti dust is made of cotton material.
• 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
• Comes with 1 mask 2 filters