Nice fit, good traction and support, and for dummies who don't know left from right, even has embroidered L and R -- just match a letter to your big toe and then look at your socks when you forget which is your left foot. Downside is that you need to remove a shoe to utilize this feature. Practical use is that feet, shaped as mirror of the other, cause socks don't get stretched by constantly changing from one foot to other in random use.