OverviewCasual enough for the beach yet functional enough to guide you to the summit. Essential features a lightweight 8-base frame with ProFlex Rubber and our Ellume Polarized lens. Ellume Polarized lenses eliminate glare and block 100% of harmful UV rays, protecting against the risk of long-term damage to your eyes. Zeal Optics frames and Ellume Polarized lenses are made from Z-Resin, a unique plant-based polymer derived from the castor plant. This durable plant-based material contributes to lighter frames and creates a high-purity lens for cleaner, crisper vision.