Bike Helmet Adult

Well, its fits very well. The rear knob that adjusts the size does that, it adjusts to the size of your head.

Lopez

The helmet is incredibly comfortable to wear. It has adjustable straps that allow me to get the perfect fit for my head size. The ventilation system also keeps my head cool and prevents excessive sweating, which is especially important during hot summer rides. I am extremely satisfied with my purchase.

Baily.B