The 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, etc). The bag itself is constructed from 600D polyester and The Dry-Tech can accommodate helmets with a HANS device still attached. For transport convenience the Dry-Tech features 2 carrying handles and a shoulder strap.