Epic Fail! Right from the get-go I could feel even where the straps are glued to the sole as these are so spongy and thin. Ive tried other Beer Cozies that were firmer than this style and did not suffer from this issue. They needed to thicken these soles to cater for the more spongy material as its made these VERY uncomfortable and I only weigh 150 lbs. Ive never had flip flops that left my feet hurting as much as these do.