The Essential is just that. Anytime, anywhere, the Essential ensures that style is just as important as functionality. The Essential&';s updated wayfarer styling is just right for today, and it&';s timeless shape has made this one of Zeal&';s best sellers of all time. This super comfortable frame is priced so that you can own a pair in each of its style-setting colors. Ellume Polarized Ellume Color Filtration PROFLEX: non-slip rubber on nose/temples Z-RESIN: minimum 45% plant-based Rx Ready Camloc Hinge Impact Resistant Permashield Hardcoat