Order of importance 1. safety 2. temperature (it's hot here now and the jacket must breath) 3. cost 4. concealed carry options I carry a G19 in a VM2 IWB holster. This setup works great for everything but the bike. My current jacket is a Phoenix 4.0 which is fairly cool with the liner out. It is only a little longer in the back than front so your plumbers crack doesn't show while bent over the tank. Are AlpineStar or any of the other quality gear a little longer to help conceal an IWB while riding?