The cylindrical Green Stereo lens fits the Atomic Revent S goggles and loves those days when the sun just comes out occasionally. Its a Fusion Double Lens which means the inner and outer lens are laminated together, giving you a 15% larger field of vision without light refractions, reflections or fogging. The multi-layered green Stereo mirror over a brown base lens maximizes color definition, protects from glare and eye fatigue and works best under scattered clouds.