Double Hat

There is a big glowing thing in the sky called the sun. In many parts of the world this causes the top of head to become warm. The traditional solution is a device called a hat but this has many drawbacks. In the protection against heat transfer the problem is that the hat itself is heated by said sun, it then conducts or radiates the built up heat to the head.

The Solution

Double skinned roofs are common in vehicles and buildings. In sunny climates, four wheel drive vehicles in particular often sport an additional roof layer to provide shade to the main roof. I propose the solution to the hot head problem by implementing double skinned roofs for people.

Take two identical but generally normal hats, place one on top of the other (possibly with thermally insulated standoffs between to ensure a reasonable (1-to 2cm) air gap) , and place on head.

The top hat then shades the bottom hat from direct sunlight and hence keeps the head cooler

Further improvements may be made by making the hats from materials with different reflectivity properties to improve the insulation between he two layers. Other improvements may be had by changing the hat shapes such that the top hat shades the bottom hat better.

And there is one final improvement. A Hat for your Hat for a Hat ...(repeat until sun goes out)