The Costa Del Mar Lifestyle Middles Sunglasses provide a relaxed, retro-inspired silhouette infused with high-performance tracking technology for life near the water. This unisex design pairs an elegant Sand Tortoise frame sculpted from lightweight bio-acetate with premium Copper Gradient 580G polarized glass lenses. Utilizing Costa's high-contrast copper base, these scratch-resistant Lightwave lenses heavily absorb harsh yellow light wavelengths to cut down eye strain while immensely broadening depth perception and color clarity. Designed with a timeless 4-base curve that feels completely natural, the comfortable frame geometry provides an easygoing profile that seamlessly transitions from coastal tracking to casual everyday wear. Built to maintain structural integrity across any beachfront or driving routine, Costa stands firmly behind this premium sunwear asset with their signature limited lifetime manufacturer warranty. Costa Del Mar Lifestyle Middles Men's Sand Tortoise Frame Copper Gradient 580G Polarized Lens Sunglasses 06S2018-20180751