Suddenly it’s easier to keep track of which alpine-binding manufacturers don’t offer an AT binding. Marker got it going with the tour-capable Duke, which spawned the whole sidecountry trend with 16-DIN downhill performance alpine skiers could enjoy. This year brings an AT binding explosion. Sister brands Salomon and Atomic get into the act with identical offerings (Guardian and Tracker). Tyrolia debuts its Adrenaline, which it shares with parent brand Head and partner brands Elan and Fischer. All are frame-style, like the seminal Fritschi: In tour mode, the boot stays clicked in while the frame on which the binding rests hinges in front of the toe. Many adventurers still prefer a more minimalist “tech”-style binding, like the Dynafit and its many recent imitators. A tech binding stays fixed to the ski in tour mode, so you don’t have to lift it with every stride.  And Dynafit continues to enhance skiability and durability with beefier models like the Radical FT, hoping to win the minds of alpiners.  So when you’re ready for some adventure (and exercise), you’ve got choices.  —J.C.