Oakley Latch Beta Sunglasses. Latch™ Beta is crafted with a handy kick-up latch feature that attaches to your shirt for easy storage, but with its bold lens shape and double-bridge architecture, it's unlikely you’ll take it off. This lightweight yet durable O Matter™ design is a fresh look that expands on the popular Latch family. - Lightweight O Matter™ frame material with Square O metal icon accents - Clip hinge mechanism that enables the eyewear to latch onto your t-shirt to secure eyewear - 4 base lens geometry with HDO™ - Available with Prizm™ lenses to enhance colour, contrast and detail for an optimized experience - Prizm Grey lenses allow 17% light transmission, for increased contrast perception in bright light conditions Oakley Latch Beta Sunglasses