How long can these be worn comfortably? I answered a couple of hours, but it will vary so wildly for people based on their regular habits. My children and I often walk barefoot inside and outside, for as long in the year as possible. We are not &#34;shoe people,&#34; for reasons of healthy biomechanics. Wearing shoes is uncomfortable after a few hours - but for someone who wears dress shoes all day, these may be like walking on beds of clouds.<br /><br />They fit my daughter well, she likes the colors and they work for the time frames that we need them for. Her feet &#34;breathe,&#34; the heel strap and upper keep the foot secured well with no toe-gripping, and without measuring, it appears there is no heel lift... so it meets her desire for an attractive pair of shoes, and my desire for healthier footwear that will not encourage unhealthy body alignment.<br /><br />I wish the sandal was made from natural materials, and not yoga mat to avoid the chemicals, but overall I am pleased with this purchase!