A meticulously crafted fusion of coastal-culture and unique brand design elements, Ulu is a sophisticated soft-square lens shape. With a touch of boldness from a subtle lens set-back, the pair is made from bio-acetate and feature a custom core with filagree and 5-barrel hinges. For those who look for refined attention to detail. Costa Del Mar sunglasses sold by authorized sellers like Amazon are eligible for all manufacturer warranties. Included is a microbag and cleaning cloth. Click on the Costa Del Mar link above the product title to shop the entire assortment.