My wife is allergic to latex, is there a safe and alternate condom material out there?

Condoms. As mentioned, the nonlatex condom is thicker, less stretchy, and decreases sensitivity more than latex. Lamb skin condoms may also be used but do not protect against HIV and are slightly less effective in preventing pregnancy. They are reportedly the best for sensitivity.
Non latex condoms. There are non-latex condoms available all over the place. Not as sensitive or as thin as latex condoms but better than nothing. Worth giving a try.