Revo Red Mirror Sunglasses Material: BPA free plastic frame + temples Frame Color: Lens Color: T AC polarized revo lens, UV400 What is TAC Polarized Lens? TAC stands for Tri Acetate Cellulose (TAC) - this polarized type of lens feature cutting edge tech formulated for superior visual and clarity. The technology is also considered scratch resistant due to its coating, impact resistant, super-lightweight, and of course blocks 100% of harmful UV rays.