{"product_id":"rockbros-photochromic-cycling-sports-sunglasses-wraparound-hd-lens-uv400-protection","title":"ROCKBROS Photochromic Cycling Sports Sunglasses — Wraparound HD Lens, UV400 Protection","description":"\u003cp\u003e\u003cstrong\u003eThese ROCKBROS photochromic sports sunglasses combine a large wraparound lens, adaptive light-reactive tinting, and impact-resistant protection for clearer, safer vision during outdoor activities.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for cyclists and outdoor athletes who need seamless performance from dawn to bright afternoon, these sunglasses use photochromic polycarbonate lenses that change tint with light levels while offering broad coverage and UV400 blockade. The oversized, curved lens reduces blind spots and glare; the lightweight, rugged frame stands up to drops and rough use; and a full accessory kit provides storage and quick conversions for prescription inserts.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these lenses adapt to changing light?\u003c\/h3\u003e\n\u003cp\u003eThe lenses are photochromic and shift their visible light transmission between about 83% indoors and roughly 21% in bright sun, so you get near-clear vision inside and darker tint outdoors without swapping lenses. The transition happens automatically as the lens molecules react to UV and bright light, simplifying all-day wear.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdaptive transmittance: ~83% (indoor) to ~21% (bright sunlight)\u003c\/li\u003e\n  \u003cli\u003eAutomatic darkening and lightening based on UV exposure\u003c\/li\u003e\n  \u003cli\u003eCombined clarity and sunglass functionality in one lens\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these glasses protect my eyes while I ride or run?\u003c\/h3\u003e\n\u003cp\u003eThe polycarbonate lenses offer UV400-level coverage to block UVA and UVB wavelengths up to 400 nm and are manufactured to be impact-resistant, which helps shield eyes from glare, wind, and small debris on trails or roads. The wraparound shape increases peripheral protection compared with standard flat lenses.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUV400 protection blocks harmful UVA\/UVB rays up to 400 nm\u003c\/li\u003e\n  \u003cli\u003eHigh-strength PC material resists impacts and scratches\u003c\/li\u003e\n  \u003cli\u003eWide, curved lens reduces wind and side-glare exposure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features make them practical for everyday outdoor use?\u003c\/h3\u003e\n\u003cp\u003eThe frames are engineered to be lightweight yet tough for frequent use in varied conditions, from wet weather to dusty trails. Each pair ships with a hard case, soft pouch, cleaning cloth, a myopia frame insert for prescription lenses, and a polarization test card so you have everything needed for safe storage and quick conversions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDurable construction suitable for cycling, running, driving, fishing, hiking\u003c\/li\u003e\n  \u003cli\u003eAccessory set includes hard case, pouch, cleaning cloth, myopia frame insert\u003c\/li\u003e\n  \u003cli\u003ePolarization test card and certificate included for quality verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the large frame affect fit and visibility?\u003c\/h3\u003e\n\u003cp\u003eThe oversized wraparound design creates an approximately 180° field of view that minimizes blind spots and enhances situational awareness during fast activities. A secure fit keeps the glasses stable at speed while the broad lens offers uninterrupted visual information across the entire field ahead.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOversized lens for a 180° wide field of view\u003c\/li\u003e\n  \u003cli\u003eWraparound shape reduces optical discontinuities at edges\u003c\/li\u003e\n  \u003cli\u003eStable, sport-oriented fit for active movement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: These ROCKBROS sunglasses are aimed at cyclists, trail runners, and outdoor enthusiasts who want a single pair that transitions smoothly between indoor and outdoor light, provides wide-field eye protection, and includes accessories for storage and prescription use. They suit riders and athletes who need impact-resistant lenses and a robust kit without carrying multiple lens sets.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these sunglasses darken automatically outdoors?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The photochromic lenses automatically darken in brighter UV light and lighten indoors, shifting roughly from 83% to 21% transmittance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use prescription lenses with them?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. A removable myopia frame insert is included so you can add your prescription lenses behind the photochromic lens.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ROCKBROS","offers":[{"title":"Default Title","offer_id":59354126025052,"sku":"B0CNGQZRLC","price":45.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1059\/5604\/9244\/files\/rockbros-front-view-large-frame.jpg?v=1791147042","url":"https:\/\/sportium.co.uk\/products\/rockbros-photochromic-cycling-sports-sunglasses-wraparound-hd-lens-uv400-protection","provider":"Sportium Sports And Outdoors","version":"1.0","type":"link"}