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The exterior of the shoe is made of Nylon air mesh and drains great while the added reinforced fiber and synthetic leather add some structural integrity. The duration of the run was in a variety of conditions including mud, water, snow and dry trails and the shoe held up very well in all of them.
The Boa lacing system was very easy and I did not have to touch it after the race started. It seems that the even distribution of the lace has been well thought out and tested as it treated my feet like royalty.
I'm now looking forward to the next run in my Aether Tech's and might use them as an excuse to get into the next mud puddle I see.