Started hiking early this year and I went to REI to buy gear. The shoe specialist sold me LaSportiva’s which I actually like. I normally wear 10 ½ or 11 and got a size 12. After about 6 months because people raved about them I decided to get Lone Peak 3.5 size 12 but they were a blister machine because they fit different from the LaSportiva’s and were too small. I kept them because they were a great utility shoe for goofing off. But I did get a pair of the then new Lone Peak 4.0. Because the 3.5 size 12 were too small I got the 4.0 in size 13. They are GIANT. I can literally put the size 12 Lone Peak 3.5 COMPLETELY INSIDE the size 13 Lone Peak 4.0 except for the last little bit of the heel. Wearing the 4.0 my entire foot rotates inside the shoe. As in rotates from toe to heal if the trail is on the slope of a hill making them almost impossible to use. Going up and down inclines they are ok but rotate like crazy on hill sides. I have tried lacing different ways, 2 pair of socks, and even 2 insoles in each shoe but they are HUGE. I have worn the 4.0’s probably too much for them to accept the back in return. And the Altra people will not return an email when I tell them I have a problem. Anybody have any idea about what I should do? Or has anyone changed from 3.5 to 4.0 and noticed the size problem? Many thanks.