1) 3layers Dust block System.

2) Inner Layer--- The mesh touched on skin is good and soft

3) NANO fabric filter - the hole is 0.5 so it. blocks most dust.

4) MESH - it is durable and protects nano fabric filter. Also, UV-protection is good.

5) Outte Layerv----It provides cooling as it block first UV & dusts

Wire - when it wears, it can adjust the wire to fit.

3D sewing - Ergonomic design so feel cozy.

Curved fram - there is a space for breathing.

Elatic band on ears - comfortable wear due to elastic band.

Adjustable the string - Using stopper the string can be adustable easily.

Chin cover - chin cover helps to fix when activity.