The Axe 2 Moto Shirt is one serious flannel, but it's casual and unsuspecting appearance is one of the coolest things about it. For starters, then entire thing-- back, front and arms, are lined with 100% DuPont Kevlar. That Kevlar is sandwiched between the outer layer which is made of 98% cotton and 2% lycra, and the internal 100% microfiber comfort layer. When I say "comfort layer," I mean snuggly soft, "Whoa damn! This thing is comfortable!" layer. Comfortable enough to keep on when I get to the office if it's a little chilly. In addition to the Kevlar layer, you're also equipped with pockets for impact armor if that's a direction you later decide you want to go. If you lift up the collar on the back of the jacket, you'll notice a strip of reflective tape to help with visibility while riding at night.