Material: Helmet Material: Made of high quality durable material, there are 9 self-adjusting EVA fillers inside, Mask material: The main material is ABS engineering, and our lenses are made of PC with strong physical properties. The cold wind can not only prevent the eyes from being irritated, but also prevent the ultraviolet rays from burning the eyes. Net weight: 0.90kg Head Circumference - One size that works best, 21.2 to 23 inch head circumference The tactical helmet suit is suitable for airsoft, paintball, hunting, CS, etc. If you have any questions, please contact us in time. We will serve you with all our heart!