It was terribly uncomfortable. Any Sanuk purchase is a gamble because their sizes vary so much from one model to the next. I've been wearing this brand for 12 years and every year it only gets worse. Don't buy their shoes without a free Prime return. 11 were huge. The 10s were very tight in the forefoot and sides, but my heel kept slipping. If I wore them for an hour, my heel would bleed from the up and down rubbing of the boot. I absolutely hated them and can't imagine recommending them to anyone else.