The Phoenix’s breathable knit upper is made with certified recycled fiber which is earth-friendly, moisture-wicking, and UV resistant — so you can enjoy your flats day in and day out. Plus, the Phoenix Knit is made without any animal products. The Phoenix Knit has a wide toe box to let your toes spread and relax. It also gives you “just-right protection” with a 5.0mm FeelTrue® rubber sole, plus the ground feedback that your feet love. And the removable 3.5mm insole lets you choose the level of “barefoot feel” that’s best for you. I wore them a couple of times.