Just real, honest, side-by-side testing and comparison. I wear a size large in most Smith helmets including the Vantage , and the Quantum MIPS fit true to size for reference, this size should work for those with a cm head circumference. All in all, the Smith Quantum really is the gold standard for riders looking for the warmest possible ski and snowboard helmet. Matte White Charcoal, S. Search for:. The pull tab is large, making it simple to attach and remove your goggles. Photo Credit. Next up is the Aerocore with Koroyd layer. The Bottom L ine.