I already owned a pair of these in brown, I wanted a white pair too.  100%  comfortable, excellent arch support and very soft on the inside.  I have recurring plantar faciitis, and I got these to wear around Disneyland.  After 2 very full days of walking my feet felt pretty great.  I normally wear a size 9 to 9 1/2, have narrow feet and have a very high arch (hence my foot problems), these size 9's fit nicely.  I wear the brown ones around my house to protect my feet, I have a lot of hard tile and on days my feet hurt these help immensely.  My mother in law tried them on when I got them in the mail and now she's getting a pair also.