Bike Helmet Mountain Bike Helmets for Adults:Men Women Bicycle Helmet Certified MTB Cycling Helmet with Visor

DUAL SAFETY CERTIFIED : DKONI bike helmet meets US & EU safety standard.

reinforced PC shell in-molded with the EPS inner foam(made in the USA)extends down the sides and back of the head for maximum coverage and durability PERFECT FIT BIKE HELMET : M size:21.2-22.5inch(54-58cm) L size:22-24inch(56-61cm) suit for men and women, convenient size adjustable dial maximize the head fit, easy to adjust the bicycle helmet size with one hand, avoid pulling hair AERODYNAMIC VENTILATION SYSTEM : DKONI Bicycle helmet designed with 17 big breathable vents,streamlined construction maximizes airflow to prevent fogging of your eyewear and makes you enjoy cool rides during long-distance cycling LIGHTWEIGHT CYCLING HELMET : DKONI MTB bike helmet only 380g (0.83 lb),will not cause any burden to the rider's head during cycling, lightweight and safe MTB HELMET DETACHABLE LARGE VISOR : DKONI mountain bike helmet large visor extends twice as long as other helmets,ABS material is more durable,protects your eye from sun,rain,mud and tree branches COMFORTABLE MOUNTAIN BIKE HELMET : thick detachable sun visor,soft inner sponge pads,skin-friendly adjustable chin strap offers comfortable wearing and better fit