The only footwear I own are Chaco Z1 sandals and mountaineering boots.  I have thru-hiked the Appalachian Trail using the Z1 sandals.  I will have to say that I thru-hiked it in 2000 and 2011 when  Chacos had vibram soles and I don't know if you can still get vibram sole anymore. I found that I could get about 1800 miles on one pair of Chacos, although I m don't have any idea how far you can go with the soles they use today.  I always carry a pair of ragg wool socks to wear when it is cool and raining.  I also carried a pair of waterproof breathable socks to wear over the ragg wool socks when there was snow on the ground.  Probably, fortunately for me the snow was never over 1-3 inches deep.  I have backpacked and hiked all over the US and parts of Canada using only Chacos.

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