1.the fram is made by the enviromental protection non-toxic flexibility strong polyvinyl chloride(PVC),can be soft and comfortable
2.closed joint face,protect from the chemical splash and the dust
3.ventilation design,protect from the chemical splash and the dust
PC strengthen lens,prevent impact and scratching
4.suitable for labor insurance driving,medical,drilling.field investigation and so on
5.the european union CE EN166F quality authentication