FEATURES of the Camp USA Rock Star Climbing Helmet Hybrid construction Slider size adjustment Comfort chin strap Headlamp compatible EN 12492 certified SPECIFICATIONS of the Camp USA Rock Star Climbing Helmet Weight: 13.8 oz / 390 g Length: 20.9-23.6" / 53-60 cm Construction: Injection Shell Material: Polypropylene ALL CLIMBING SALES ARE FINAL.