The Costa Del Mar Rinconcito 9016 Sunglasses bring West Coast surf culture and serious optical performance together in a medium-fit rectangular frame. Named after the legendary Southern California point break, the Rinconcito is the more compact sibling of Costa’s popular Rincon model, designed for anglers, boaters, and outdoor enthusiasts who need reliable sun protection without the bulk.

Costa 580 Lens Technology: Glass vs. Polycarbonate

The Rinconcito 9016 is available with Costa’s proprietary 580 lens technology in your choice of glass (580G) or polycarbonate (580P). The 580 designation refers to the specific light wavelength580 nanometersthat these lenses filter out to enhance contrast and color. By blocking harsh yellow light, the lenses make reds, greens, and blues pop, giving you sharper vision on the water and in bright conditions.

The 580G glass lenses deliver exceptional optical clarity and are virtually scratch-proof, making them ideal for saltwater environments where you need to wipe salt spray off your lenses frequently. They’re 22% lighter and 20% thinner than standard polarized glass. The 580P polycarbonate lenses are lighter, more impact-resistant, and budget-friendly, with Costa’s C-Wall coating for added scratch protection. Both options are fully polarized and block 100% of UV rays.

Bio-Resin Frame & Prescription-Ready Design

The frame is constructed from bio-resin nylon derived from castor oil, part of Costa’s Kick Plastic initiative to reduce petroleum-based plastics. This eco-friendly material is lightweight, durable, and holds its shape under extreme heat and cold. Integral spring hinges provide flex and comfort, while Hydrolite rubber nose pads and temple grips prevent slippage even when you’re sweating or wet.

The Rinconcito features a 6-base curveflatter than many sport sunglasseswhich makes it extremely prescription-friendly. If you need Rx lenses, this frame accepts a wide range of prescriptions without the optical distortion common in highly curved frames. The rectangular shape and 60mm lens width suit medium faces and work well on both men and women.

Who It’s For

Reviewers consistently mention the Rinconcito’s versatility. It performs on the boat, the golf course, and during everyday wear. The polarized lenses cut glare on water, snow, and pavement, and the medium fit works for people who find the larger Rincon too big or wraparound styles uncomfortable. If you want Costa’s legendary lens quality in a frame that doesn’t scream “fishing sunglasses,” the Rinconcito delivers.