Dsi dual Shell integration: Zipmold+ impact foam, ABS plastic hard shell. We married two technologies to make the ultimate head protection love-child.Multi-directional Impact Protection system - Designed to protect against rotational violence to the brain caused by rotational impacts. The innovative Dual Shell Integration (DSI) construction combines the lightweight properties of our Zipmold+ and PVC lower shell, with the durability of an ABS top shell. Designed with safety features like EAR (Energy Absorbing Ribs) for greater impact dispersion and aluminium shields for added durability. Not your typical hybrid species, The heist is in a class of its own. This item is in the category "Sporting Goods\Winter Sports\Clothing, Hats & Gloves\Helmets". The seller is "booksgreatoffers" and is located in this country: GB. This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Republic of, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, United States, Canada, Norway, Mexico, Switzerland, Bermuda, Guernsey, Gibraltar, Iceland, Jersey, Liechtenstein, Monaco.