Black Diamond Vapor Helmet Envy Green Medium/Large. The updated Vapor helmets two-piece construction contains a layer of super-light ALUULA composite under the polycarbonate crown for added protection and reduced weight. Molded EPP foam makes up the sides providing ample venting with the same sleek aesthetic. An ultralight cord fit system makes adjustments and fit easy to fine-tune. Streamlined (and replaceable) headlamp clips are ready for alpine starts or after-dark raps. Specifications for Black Diamond Vapor Helmet: Manufacturer: Black Diamond Gender: Unisex Age Group: Adults Features of Black Diamond Vapor Helmet Multi-material construction to minimize weight and bulk while maximizing durability Lightweight and packable cord fit system stows and adjusts easily Geometric open-air design allows unparalleled airflow and iconic silhouette UIAA and CE Certified Package Contents: Black Diamond Vapor Helmet Black Diamond BD6200083011ML1: Vapor Helmet Envy Green Medium/Large