I'm interested in this GTX style boot, but recently when I went to REI to replace a pair of 20 year old hiking boots with boots from the same vendor, their sizing had changed. I ended up not being the same size as the pair boots I was replacing. Therefore it is really hard to buy shoes online without being able to exchange in the event the size is wrong especially with a massdrop style policy. No one wants to hike in a wrong sized boot.