The Giro Shackleton Helmet is designed to keep you warm and safe as you commute during the coldest months of the year. The winter lining has a bunch of customization options to make sure you are warm enough without overheating. There are hear-through ear covers and a neck roll to accommodate the changing weather. There is a removable soft visor for extra sunny days. There is an integrated light clip to increase your visibility around traffic and other riders. There is a reinforced port so you can secure your helmet with your U-lock. The reinforced port and webbing are both reflective. The Cord Loc Fit System helps you find the perfect fit each time you go to ride quickly. There are 8 vents with adjustable inner shutoff flaps for the brow and exhaust vents.