I finally bought these after a tough decision between the Chaco Z2 unaweep. I'm thrilled with my choice. My foot feels more secure in the teva sandel, and I love the spider rubber. So far these have held up against slippery rocks in many fast running rivers. They even held up soaking wet for a 4 mile walk home after a canoeing trip gone wrong. I ordered a 6.5 (I am a small 7 or large 6.5) so if you're in between a size, I'd go for the smaller.