1. Max head circumference: 24.4 inch; Minimum head circumference: 20.4 inch; Inner shell Material: imported black EPS
2. The ventilation slats in the top of the helmet breath as it should be and the headlamp clasp-things on the back and front are a in point of fact nice feature.
3. The chin strap and buckles are placed just right in order that nothing rubs uncomfortably on my face, jaw, chin, and so forth.
4. The helmet is pretty comfortable and ridge, in point of fact light, sturdy and very portable , its fits perfect while you adjust the straps and twist the knob in the back.
5. Easy release for while you dispose of it, you’ll use it to fine tune a tight fit to your head, Straps are easy to adjust and are soft to not bite into your neck. Extremely light, extremely comfortable, breezy, easy adjustments.