Adult Bicycle Helmet Adjustable Size Mountain Bike Helmets with Removable Sun Visor

【Optimal Ventilation & Lightweight】Featuring a unique aerodynamic design, 18 vents, and a sleek structure, these helmets optimize internal airflow to keep your head cool and dry. Moreover, their ultra-lightweight design, weighing only 270g, ensures long-lasting comfort without burdening the rider's head and neck.

【3D-Adjustable & Comfortable Fit】For a customized fit, rotate the dial at the rear of the helmet. Adjustable side straps and a padded chin strap further increase comfort. These bike helmets cater to M/L size heads and provide a tailored fit for most teens and adults. Suggested head circumference: 21.3-24.4in/54-62cm (please measure your head before purchasing).

【Detachable Visor & Breathable】Equipped with a removable visor, these helmets offer shade while riding, reducing glare and enhancing visibility. The detachable inner pad features breathable material, ensuring a comfortable wearing experience and easy cleaning while reinforcing internal structure for a secure, well-ventilated fit.

【Versatile Use & Applicability】Recommended for ages 8 and above, these helmets cater to various riding styles and are suitable for both men and women. They can be used with commuter bikes, mountain bikes, road bikes, skateboards, roller skates, balance bikes, and more.