I've never really seen the utility in trekking poles, but when you mentioned carbon fiber as the primary material my antenna went up. CF means the poles would be light enough (10 ounces per pair) that they can be taken along on a walk even if not needed. REI currently has four different models of Black Diamond Trekking poles of which the Black Diamond Distance Carbon Z-Pole Trekking Poles seem to match the description of yours. That said, what is the difference in durability and performance(?) of the types of grips? Is there an advantage of cork vs EVA foam grips? TIA.

I'm not a buyer yet, just thinking...