Thankyou everyone for the advice. As is usual for us, we forged ahead with this endeavor before finding out anything we needed to know, and then made adjustments along the way. I agree with the fact that trail runners might not have the stability.Maybe he could benefit from a Merrell type light hiking shoe. When I bought him the snowshoes he has, the sales person sold him a pair that was meant for carrying a pack. That's probably too much weight, but I would not have known better at that time. I don't know if he will let me talk him into another pair of snowshoes. He has a total aversion on spending money on himself. Unless it's to buy endangered farm equipment, to keep it from ending up at the scrapyard! He's a one-man histirical preservation society!