Stealth Lightweight Spectacles. The world's most lightweight EN 166 spectacle, weighing only 16g. • The world's lightest safety eyewear • Maximum comfort for all day use • Next generation dual 9.5 base • Ultra-thin and ultra-strong optically perfect lenses • Clear polycarbonate frame and lenses • Lenses include Hardia™ Anti-Scratch 'K' • Lenses filter out more than 99.9% of harmful UV light • Conforms to EN 166.1.F.KN ANSI Z87.1 • Lens Thickness: 1.4mm • Overall Width: 136mm • Weight: 16g