1. durable and soft PVC frame 2. PVC lens 3.direct vents ,protect against dust 4.economic type JINHUA HENGFA TOOLS CO ... Our main products include: Safety Glasses, Safety Goggle, Welding Goggle, Safety Helmet, Welding Mask, Dust Mask, Respirator, Earmuff & Earplug etc,JINHUA ... 3.direct vents ,protect against dust4.used in gas welding, cutting and brazing operations5.flip-up front design ,easy to work ...