I love it! I've been looking for comfortable flip flops for years but they are always either unattractive or don't fit well. They fit great and are very comfortable. I use the same insoles in every pair of my shoes because my arch hurts, but I didn't even need to add insoles to them. Feel like you're walking on clouds. I love that they work with both shorts and trousers/jeans. I liked them so much that I also ordered the leather version. And yes, they can be tightened by simply untying the knots, tightening the elastic threads and tying them again. LOVE THESE!