Helium 15 eyewear has metals infused blue temples that provide visual detection, magnetic and x-ray detectability. Ideal for food and pharmaceutical industries Weighs only 15 grams, the lightest eyewear on the market that maintains class 1 optics These eyewear feature a 50% Copper Blue Blocker lens, that reduces glare and enhances visual acuity. Ergo fit contour temples, follows the shape and lies flat to your head Temples securely holds the frame in place for better non-slip compliance