These clogs are so comfortable they have been on my feet almost constantly since I got them!  I honestly didn't think I would like them when they arrived. I have flat wide feet and when I first felt the bumps and crevasses I thought, Oh no, these are going to hurt - I'll have to send them back.  But boy, when I put them on and walked, my feet thought they were in heaven!!  After 3 days I realized that I hadn't worn my new slippers and didn't want to!!  NOW I understand what I've heard for years about Birkenstocks - they are the best shoes in the world!!  I plan on buying more and not wearing any other brand ever again!!