Office flats that have memory foam??

mimi

I like to use the standup desk at work for at least 5-6 hours per day. My legs wont feel tired or anything but my heels hurt a lot as my office flats are just too thin. I dont seem to find any work flats that have memory foam or some sort of inspode support. Im fine using the stand up matt with my bare foot, but i cant just put my shoes off all the time...