Mesh facescreens are designed for low-velocity particle protection (such as woodchips from forestry activities). Metal screens deliver high heat resistance for those applications where ambient temperatures are high. Mesh screens have the added bonus of never fogging in high humidity environments. Features & Benefits: Mesh facescreens are designed for low-velocity particle protection (such as woodchips from forestry activities). Metal screens deliver high heat resistance for those applications where ambient temperatures are high. Mesh screens have the added bonus of never fogging in high humidity environments