Finally found a sport sandal that suits me! I have narrow heels and thin bony legs. I also have sensitive skin and onions from the top of my foot just below my big toe. I tried to find a comfortable sandal waterproof for more than a year and that's it! I bought last year and realized they Keens are simply too big for me. I could not shake the heel because it is not adjustable. Plus they made me look like Minnie Mouse because I also have long thin legs. Then I bought the Unaweep Chaco. You can not adjust the heel on these two, and I was able to get adjusted tight enough to stay, but then the straps were uncomfortable on my toes. I also found the plant rough on my skin. So I returned these. I tried on other Tevas in a store, but they lack the soft lining and Velcro straps between your skin and I found the velcro very uncomfortable. These shoes resolved all these problems. I have one day before my trip to the Caribbean and was able to wear them all week with no blisters or problems. I did some light hiking (two miles) of sand on rocky trails with no problem.