3M™ Pressure Diffusion Temple Technology means there are no moving parts and nothing to adjust, while the versatile design is suited for a wide variety of faces. Lightweight, weighs less than 1 oz. Continually self-adjusting for a secure, comfortable fit. Polycarbonate lens absorbs 99.9% UV. Meets ANSI Z87.1+ High Impact standard. Certified to the requirements of the CSA Z94.3 standard. 20/Case.