Decades ago, I discovered that when I wore these sandals, I was less likely to have trouble with my ankles. I don't know whether that was because of the musculature developed by keeping the shoes on my feet, or that my proprioception improved from the "feedback" that the nodules delivered from the sole of my foot to my brain. I love them, they're comfortable, and I wear these daily. (In cold winter, I wear them inside. For outdoors, I use an inner sole with the same kind of nodules to slip inside my shoes.)

I do have some issues with how the nodules break off over time, ostensibly "giving a better fit" according to the manufacturer. But I feel they're good value, and I more than get my money's worth out of them.

To clean the lint out, simply open the top portion, turn them upside down and rap them sharply on the ground. I'd like to see them produce a washable pair, similar to what Adidas offers.