These are the answer for those of us that love low-profile shoes but want something to protect our feet from friction that doesn't show.  Many of my shoes have low profile sides and toe box. I've hunted high and low for footies that don't show. These also have the added bonus of having a pad under the ball of the foot.  I love them.  I only gave 4 stars because the heel cup jacks up outside the shoe when putting on some of my tighter shoes.  In most cases a bit of creative finagling and I can make it work. But these are the best I've found yet.