Helmets are perhaps the kings of diminishing returns -- after all, every bicycle helmet sold in the US is subject to the same testing, and requires the same certification. What s left after that is ventilation, fit, and, of course, style. Giro s Savant has all three in spades, at a price that doesn t require an immediate grams per dollar calculation. The Savant is secured with Giro s Roc Loc 5, and features 25 Wind Tunnel vents to keep air moving into, through, and out of the helmet.