The only trekking poles that I'd ever use are ones that are impromptu pieces of craftsmanship made from fallen branches. However, if you'd prefer the shock-absorbing, lightweight performance of manufactured trekking poles, you can't go wrong with Leki. A new innovation that they just dropped at OR is the Speedlock, which is essentially a quick-release lock adjustment for pole length. Snap the Speedlock open, adjust the pole using measurement markings and snap it shut. "The most powerful external locking system in the world" is available on a variety of Leki poles including the Khumbu Aergon and the Cressida Aergon. Not sure that the Speedlock will make price tags of $100 or $120 worth it, but it's a cool little innovation.