GIRO COMBYN HELMET NAMED WINNER OF ISPO AWARD 2013 The Giro Combyn Helmet uses a patent pending, impact absorbing liner made with Vinyl Nitrile VN foam. The liner features two distinct layers of foam that allow the helmet to manage both high and low energy impacts across a wide range of temperatures. Unlike traditional expanded polystyrene EPS or expanded polypropylene EPP helmet liners, Vinyl Nitrile is soft and flexible. Layered with a proprietary shell material originally developed for football and hockey helmets, the result is a shell that delivers a comfortable and flexible fit with unmatched durability. There's no set number of impacts the helmet can take. Where traditional helmets are done after one hard blow, the liner in the Combyn basically never degrades. But if there's ever any doubt about how well it's holding up after numerous impacts, the user can send it back to Giro free of charge Giro will pay for the shipping to have it analyzed. The helmet has eight stacked moisture channeling vents and a removable goggle retainer. Available in three sizes. Features: Unique, flexible Soft Shell construction Vinyl Nitrile dual density liner 8 Super Cool Vents Stack Ventilation 3 Fit Kit sizes Removable goggle retainer Compliance CE EC1077 Review: We are excited to offer riders a new option in helmet construction, explains Giro research and development director Rob Wesson. From skiing powder in the backcountry to riding in the park, the mountains provide an incredibly diverse set of riding conditions. If multi impact durability is important to you then soft shell construction is something you should consider.