I didnt care for foam grips. Its been several years since I had foam grips on my ST1300. They looked cool but were impossible to hang on to. You could not maintain throttle control with out applying ALOT of grip strength to hold the throttle in place. This led to fatique in short order.
Personally I like the stock grips on a Wing. Save some bucks and leave them alone. My fav grips are on a BMW RT. Those fit my hand the best of any. I live in Arizona so any grip with exposed metal is OUT of the question. Enjoy the ride.
I just got a pair of double thick Grip Puppies " style " foam overlays. A local riding bud got six pairs for $30 from some member on the " other " forum. As these are too thick for his grip I happily ordered him a pair of official Grip Puppies in exchange for his no name brand.
I had the iso-grips. They did not fit my hands and were very hard. I finally threw them away. I now have aftermarket heated and grip puppies. I have had them a couple of years with no problems and about twenty five thousand miles.