Brandon Roberts wrote a review of Mammut T Aenergy GTX Boot - Men's on January 3, 2014
Familiarity: I've put it through the wringer
Fit: True to size
What is has in comfort it lacks in durability. I do love this boot, from the moment I tried it on. Never required any break in with me, just comfort from day one.
Unfortunately after a little over a year of work and trail use they have to be retired. The synthetic material came apart where the foot flexes. Looks like the harder plastic that extends down from the laces cut through the synthetic mesh. (Happened at all four flex points, two per boot. )
Because of this they now allow water directly in.
I felt they should have lasted a little longer. Wish they would have. Very comfortable.