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This is a good pick for an all-day, all-arounder. One of the stiffer new models, the Thunder is at its best on slabby to vertical faces where you inside and outside edge much of the time. The Thunder is at its worst in the gym or bouldering, where it’s inability to smear is glaringly apparent. Underfoot, the Thunder feels boardy, but its stiffness also means that foot fatigue won’t be an issue. With only a hint of a camber, it lets your toes lie naturally flat—I could wear the shoe most of the day, and even hiked in them a bit, no problem.