For great comfort and excellent protection, take a look at our essential E10 Safety Glasses. With a choice of three lenses, you're sure to find a product to suit the task at hand. Scratch-resistant polycarbonate lenses. Lightweight design. 12 Pairs Per Box - 300 Pairs Per Case. Conforms to EN 166. Conforms to EN 170 (Yellow only). Conforms to EN 172 (Smoke only).