After years of trying, I've found the perfect ultra-invisible socks! super comfortable! Not too thick and not thin. Sperry and Vans. You don't fall! Most others that stay in place have a conspicuous elastic ring around the foot opening (a white Timberland sock with a dark elastic ring) that leaves a large mark on the foot. The ones I've tried in the past that didn't have this (the blue Merrell sock in the picture) are good but end up slipping. Last week I bought 3 packs from another store and wear them every day. I love them so just ordered another pack of Revain at a good price.