I bought a pair of full tilt booters last year and have since used them for 100+ days and they have developed a hole in the heel of the liner.
Other info:
I did go to a bootfitter and they are the right size/shape for my foot
I emailed full tilt and they have not gotten back to me within about two weeks
long story short, look at the pic and tell me if this is wear and tear or defect