Finitoglass

Fenito glass was a material dveloped in the far future that could wtihstand the radiation produced from X-tonic rays for extended amounts of time depending on the thickness of the glass. For example on the planet Midnight the leisure palace was fitted with huge domes of Fineto glass 15 feet thick ensuring permenant protection from the rays whereas on the shuttle buses the glass was only strong enough to hold back the radiation for a few minutes.