Hmmm. Interesting question. Id probably go with an ice-climbing helmet, as most ski helmets are somewhat bulky and extend over the ears for warmth. That might not be a bad thing for ice-climbing, too, but generally I think you want a little more ventilation when working hard but not moving that quickly, such as when picking up a frozen waterfall.
Grivel Salamander helmet
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Otherwise, climbing helmets and ski helmets have a fair amount in common. Both typically have ABS plastic shells, and, most important, they dont have a lot of vent holes so sharp rocks or ice chunks cant penetrate. In a climbing helmet, the Grivel Salamander ($75; www.grivel.com) would do well when on ice, and wouldnt look too out of place on the ski slopes. The Giro Encore snowboard helmet ($69; www.giro.com), on the other hand, would work well on ice as well as snow.
You might also look into a multi-sport” helmet such as the ones from Bern Unlimited, a U.S. company that launched in January 2006. They make helmets that can be adapted to various sports by swapping out liners. The Bern Brentwood ($99; www.bernunlimited.com), for instance, could be used to climb or ski or even kayaknot bad.
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