My DS is a robust 8.5 years old and his sensory stuff has ebbed and flowed, gotten leaps better. But he is still crazed by seams. No socks, no pockets, etc etc... I have ben trying to find him some soft sweatpants with no pockets. Maybe reversible ones. Any ideas?? He usually only submits to Hanna Anderson and Petit Bateau pants but I will try ANYTHING.
I get clothes for my sensitive dd here:http://www.basicbrilliance.com/boyspants.html, but they only go up to size 8 so your ds might have already outgrown them. For us they seem to run big. I also find the few things they have here good for my dd, but it might not fit your criteria:http://funandfunction.com/clothing-pants-c-65_332_339.html. J. Crew also has boys knit pants that I have purchased for my girls.