There is nothing about them that I dislike and lots to love:
- Low cut but with just a little extra in the front and back to help keep them from slipping into the shoe.
- Wide, firm but not painful arch support.
- Actually shaped like a human foot - flat on the bottom, instead of flat when sideways.
- Left/right specific.
- Nice cushion under the ball and heel but not excessive.
- Green (sort of) because they're PVC free.