the google searches and the manufacturers recommendations that i have seen so far say 55-86 degrees. what keywords are you using? As I said, for a short time I'm not esp concerned, but if we are going to be out for an hour or 2 (granted we rarely go out when it gets that hot, but you never know)....i don't want to be replacing these all the time.
I did see many folks are using 'frio' bags which do keep them at a cooler temperature. btw, anyone who does have an epi and you like the frio bags, if you are crafty you can make one yourself, the gel crystals are available at most craft stores.
They say I have A.D.D. but they just don't understand. Oh Look! A chicken!