The iPT Wideride 12.0 D (or 14.0 D) bindings are wider, more secure, and lighter weight than other binding systems. The Extended Double Grip feature of the Unlimited AC50 gives you more height on the ski's edges, for consistent pressure distribution. This ski is a step up from the lower cost Unlimited AC30 in that it has titanium reinforcements (which give you more control at high speeds), and an Extended Sensorwood Core (which consists of a full-length wood core sitting beneath the Extended Double Grip chambers, and offers a more responsive feel throughout the ski). However, it lacks the flagship Unlimited The Grizzly's Power Switch, which consists of two carbon fiber rods in the ski's core that you can control in three settings, altering responsiveness. There are size options available for the Volkl Unlimited AC50 all-condition ski.