The Sparco Dry-Tech helmet bag is designed to keep your helmet dry and protected. The Dry-Tech has unique built-in drying system with a 12V fan and ventilation holes. The 12V fan is powered by a USB chord, so any powered USB adapter up to 12V will work (phone and tablet chargers). The bag itself is constructed from 600D polyester and can accommodate helmets with a Hans device still attached. For transport convenience the Dry-Tech features 2 carrying handles and a shoulder strap. Dimensions 14" x 14" x 16".