For crampons, I'd ditch the heavy stuff right now and go with something lighter. Not a "traction aid," but a true light crampon. An ideal model is Grivel's G10 ($98; www.grivel.com). These are ten-point crampons with relatively relaxed teeth angles and sharpness. They fit a wide variety of shoes, from trail runners to boots, go on easily, and offer enough grip for most moderate ice slopes. And, they're pretty lightabout 26 ounces for a pair.
Black Diamond's Whippet is an interesting gadget. It's basically an ice head that fits to the handle of Black Diamond trekking poles. I'm sure it works as advertised, but I should think it would take some practice to learn to self-arrest with a long trekking pole. I'd stick with one if you do favor this option. In case of a slip, having two pointy things flailing around may cause more problems than it solves. Moreover, the cost is $78 for one of these heads, and it weds you to BD polesnot necessarily a bad thing, but it does limit your options.
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