PRODUCT DESCRIPTION: 

1> DIRECT VENTS,FREE BREATH DESIGN, SUITED TO WEAR FOR LONG TIME 

2> COMFORTABLE BLACK ELASTIC

4> STABLE, FLEXIBLE, THICKER PVC FRAME; TRANSPARENT PC LENS 

5> USED FOR INDUSTRY AND LAB , PROTECT AGAINST DUST AND LIQUID

6> LENS CAN BE MADE ANTI-SCRATCH ,ANTI-FOG AND ANTI-UV