Clarity is everywhere on Smith's Circuit Helmet. It features a Smartshell On Mold construction that does away with the EPS lines found on most ski and snowboard helmet designs. The Circuit has Smith's new AirEvac ventilation, a contoured vented configuration that optimizes airflow around your goggles (you DO have Smith goggles, right?) to minimize the chance of fogging far better than conventional ski and snowboard helmets. There's also Smith's Regulator ventilation system so you can tweak the vent cooling to match the climate around you. The Snapfit ear pads and Techliner can be removed for easy cleaning between ski days. Because the liner material is lightweight and fast drying, you can usually clean and dry the fabric overnight without hassles. Smith's Circuit Helmet is fully compatible with Skullcandy Twin-Tip and Single-shot audio system connections, so you don't have to worry about leaving your tunes at home.