Safuty1st Bike Helmet for Adults - Lightweight Mountain Bike Helmet with Visor, Impact-Resistant Cycling Helmet for Men Women, Adjustable Dial Fit for Mountain Biking & E-Bike Riding

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【 Lightweight Impact-Resistant Shell】Our adult bike helmets undergo rigorous testing and complies with U.S. CPSC and ASTM Safety Standard for Bicycle Helmets. Built with a high-density EPS foam core and durable ABS shell, this bike helmet delivers reliable impact absorption for mountain biking, road cycling, and e-bike commuting. Weighs just 340 grams, so you barely feel it on longer rides — no neck fatigue, just all-day comfort and protection 【 One-Hand Adjustable Dial Fit System】Dial in your perfect fit in seconds with the micro-adjustable rotary dial — even while riding. The fit ranges from 21.7" to 22.8" (55–58 cm / Large), and 23.2" to 24" (59–61 cm / Large), accommodating most adult head sizes. Combined with the padded chin strap, it stays snug but never squeeze 【 Removable & Adjustable Visor — Sun & Splash Protection】 The built-in visor shields your eyes from direct sunlight, low-hanging branches, and trail debris. It's fully adjustable for tilt angle and removable when not needed — ideal for both off-road trails and e-bike commutes where glare is a real issue 【 16-Port Airflow Ventilation System】Engineered with 16 strategically placed vents and deep internal channeling, this helmet keeps air moving across your head even on hot summer climbs or e-bike commutes at city speed. Stay cool when the ride heats up 【 Versatile Use: MTB · Road · E-Bike · Commute】Whether you're hitting mountain trails on weekends, cruising to work on your e-bike, or taking a relaxed ride around the neighborhood, this unisex helmet fits every ride. Suitable for adults, teens, and youth — one helmet for the whole family