In the opinion of Timberwoof of Timberwoof’s Motorcycle FAQ: Aerostich, Joe Rocket, Draggin Jeans, Tourmaster, or FirstGear.
If you want a light alternative to heavy leather. You have to use Kevlar lined Jeans. Draggin Jeans are fine, but they only cover part of your body. The best alternative is to use K-Liners. They are full length 100% Kevlar underclothes. I just slip my jeans over them and away I go. They even made them to size at the same price as a draggin pair! (and there even lighter).