AGL doesn’t run its own factory. Its discs come out of Innova’s, and every AGL plastic is built on an Innova regrind, so the three blends map straight onto Innova’s: Alpine is Champion-class, Polar is Star-class, Woodland is a Nexus-based baseline.
That makes AGL the easiest brand on this site to read. If you know how Champion and Star feel, you know Alpine and Polar. The Hemp runs add fibre to the fill for texture.