The AeroSafe Tornado Shelter is designed with science in mind.  

The aerodynamically shaped main body reduces the drag and friction of the wind, making it more resistant to tornadic damage than shelters with square corners.  

The arched shape has inherrent compression resistance to make the shelter less likely to crush under heavy loads.  

The 1/4" and 3/8" steel make it virtually impenetrable to the types of flying debris found in tornados.

And we did all this at a very affordable price!