Just like it says. This material is formed by extrusion. It’s softer than our other two bases, which isn’t necessarily a bad thing. At the speeds many of us ride, this material is actually quicker (gets up to speed faster) than sintered when waxed correctly. You may have your own proof of this when you’re smoking by someone with a dried out “high-end” base. It also retains wax better because it’s more porous and is easy to fix with a P-Tex stick if you get scratches in it.