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Free Shipping & Returns
Free Shipping & Returns
Free Shipping & Returns
Don't pay a cent for standard shipping ever again. Other shipping options are available. Learn More
Not 100% satisfied with your purchase? Return them within 45 days for a full refund or exchange. Learn More
See Better Guarantee
See Better Guarantee
See Better Guarantee
We understand prescription lenses are an investment in your vision. At SportRx, we go beyond premium brand names and prescription lenses. We give you friendly professionals to help you find what you need and 45 days to make sure you’re happy with your purchase. Your satisfaction is our promise, or your money back. Learn More
FSA & HSA Accepted
FSA/HSA ACCEPTED
FSA/HSA ACCEPTED
Flexible spending accounts (FSA), health savings accounts (HSA), and out-of-network vision insurance coverage can all be used towards awesome new prescription sunglasses, eyeglasses, and goggles. Learn More
SportRx Frame Width™ (SFW) is the measurement our Sports Opticians use to find the most accurate fit possible. Unlike most eyewear measurements that have little to do with fit, SFW serves as an indicator for how well a frame or goggle will fit your face.
The Costa Mainsail sunglasses are the perfect blend of style and performance for casual everyday wear or the most extreme expedition. Designed with the adventurous in mind, these sporty square sunglasses are made from lightweight bio-resin and feature double-injected Hydrolite® temples and vented nosepads for a secure, comfortable fit. The subtle side shields block light without appearing overly built, while sweat management channels help keep you cool even in the heat of the moment. These sunglasses are ready for any adventure you can throw at them. If you need prescription lenses, SportRx has got you covered. Don't let your vision hold you back on your next adventure – customize your prescription Costa Mainsail sunglasses today and take on the world in style.
Benefits
Beyond Polarized
In addition to fighting glare, Costa 580 polarized lenses filter out harsh yellow light & absorb bad HEV blue light. Experience higher definition, sharper contrast, & enhanced color.
Here to Stay
Never worry about your sunglasses falling off again. Costa’s Hydrolite material will absorb your sweat, keeping them secure and comfortable all day long.
Slip Free
Rubber nose pads keep your frames in place and optically aligned even as you sweat, jump, slide, bounce, you name it.
Secure Comfort
Rubber temples aid a secure and steady grip so your sunglasses can rest comfortably on your head.
Sweat Management
Unique frame design allows for increased airflow which wicks away and drains any sweat or moisture you work up.
Increased Airflow
Control airflow and reduce fogging in your lenses with vented nose pads. They'll provide all day comfort while managing any excess sweat you work up.
SIZE & FIT GUIDE
Lens Measurements
1 - Lens Width: 55 mm
2 - Lens Height: 43 mm
Frame Measurements
3 - Bridge Width: 18 mm
4 - SportRx Frame Width™ (SFW): 132 mm | Learn More
Block carcinogenic ultraviolet (UV) light from reaching your eyes. With 100% UV protection, your eyes are safe from absorbing harmful sun rays.
One Lens, Multiple Corrections
Progressives allow you to see near and far in one pair of glasses. Vision in progressives feels natural with the multi-focal lens seamless transition.
6 Base
The most common base curve for casual wear glasses. These types of glasses will have a slight curve to the lenses and frame, but are still fairly flat.
Always Close By
Hooks from the temple tips, allowing you to take off your sunglasses so they can rest on your chest like a necklace. Never lose another pair again.
Included Accessories
Hard Case, Microfiber Bag, Two Year Manufacturer Frame Warranty
Designed by anglers and in-house light spectrum experts, 580® lenses deliver greater clarity and contrast. All 580® lenses boast a 99.9% polarized efficiency, the highest level available on the market.
Costa 580® Lens Technology
Costa 580® polarized lens technology is the next level in color enhancement and glare reduction. Designed by anglers and in-house light spectrum experts, 580® lenses filter out haziness and combat reflective glare on the water, so you can enjoy the day's outing with clear views and rested eyes.
Beyond Polarized
Brighter Colors
Filters out harsh yellow light and harmful HEV blue light, cutting haziness for more vivid colors and sharper, high-definition contrast.
Fights Glare
580® polarized lens technology cuts reflective glare that bounces off surfaces like water, chrome, and asphalt to provide distraction-free clarity and visual comfort.
Clarity & Durability
580G® lenses are made of the most optically correct material available: glass. Optimized for clarity, 580G® lenses encapsulate mirrors in between layers of glass, for a crystal clear, scratch-resistant surface. 580P® lenses are made of the most impact-resistant material available: polycarbonate. Optimized for durability, 580P® lenses provide the most lightweight and impact-resistant protection on your all-day outdoor adventures.
580® Mirrors
Blue Mirror
Grey base with a 10% visible light transmission that is Costa's most popular lens color. Best for bright sun, open water, and offshore fishing.
Green Mirror
Copper base with a 10% VLT that enhances contrast for inshore fishing. Excels in bright sun and on flats.
Gray Silver Mirror
Gray base with a 10% VLT that works well in any environment. Perfect everyday lens for land and water.
Copper Silver Mirror
Copper base with a 12% VLT that enhances contrast in low-light environments. Excellent for sight fishing and stream fishing.
Sunrise Silver Mirror
Yellow base with a 25% VLT that has a brightening effect in very low-light conditions. Ideal for dawn, dusk, and overcast days.
580® Non-Mirrors
Gray
Natural vision with a 12% VLT that accommodates a variety of outdoor activities. Versatile lens for everyday use.
Copper
Contrast-enhancing lens with a 12% VLT that cuts glare in a variety of situations. Great for inshore and sight fishing.