The Cool Shirt Cool A Clava is the perfect solution for keeping the temperature down inside your helmet. It is very easy to install and is made from a soft and thin material which won't effect the original fitting of your helmet. It can be fitted into most helmets and no modifications are required to the lining of your helmet.With the limited head room you have in race cars, fitting air intakes to your helmet can now be a thing of the past.The hose ends have quick release fittings on them which makes connecting and disconnecting very easy, even with race gloves on. If you are getting out of your car at the end of session, or doing a driver change mid race, these fittings will make life easier getting in or out of your race car.Made from a soft material so it feels identical to the lining of your helmet.The Cool A Clava is compatible with any of the iced based or non ice based Cool Shirt systems.