you should look for the sheepskin covers , i think they would be the best

I see this is a pretty old message. And you may have already bought your car. I would just like to say that I have pretty severe MCS and ended up having to buy a used car 3 years ago. I got one with leather seats. I didn't want leather but that was the car I ended up with. I didn't have too many choices. I have been so reactive to the leather in this car and it's 5 years old. It may be that the former owners used cleaning products on it that have permeated it and still linger. I don't know for sure whether it's that or the leather itself. But, I will never own another car with leather seats if I can at all help it. Just my two cents worth.