The Marker Jester Demo is on of the best demo/adjustable bindings on the market.  Designed for aggressive, big mountain skiers, looking to push their gear and themselves to the limits.  With a 6-16 DIN range this is for high end skiers with wider skis.  The resigned heel and toe piece ensure that you stay locked into you binding even in the roughest of conditions helping prevent pre-release.  With this binding being a demo, you are bale to quickly adjust the size of the binding, perfect for those that change boots fairly often or like to share their gear.