These [Super Makalu Cor-Tec] are supposed to be replacements for my son. He has hiked the AT and PCT and next year we go to the CDT and he is only 13. he outgrew his kids sized ones that lasted him through the first 2 hikes. I managed to bend the lower section of this new set and then when i took it apart to try to fix it, i lost the the dang lower section. But REI doesn't carry parts apparently. And our favorite Hike was the PCT. My pair though battered is still holding up and will hopefully last for the CDT as well.