This cotton sock comes in a 2-pack. This is our invisible sneaker sock.The cotton sock is not visible while wearing shoes. Thanks to the silicone anti-slip strip on the heel, the sneaker sock stays perfectly in place when worn. But the shape and model of the sock are just as important. The knitted fabric has several sections that are finished with more compact elastic mesh. For example, a panel runs across the instep and under the arch of the foot, and the back of the Achilles tendon is visibly and elastically reinforced. A seamless, pre-shaped heel cup is worked into the fabric. Once the heel slides into this cup, the reinforced panels in the fabric enclose the foot in the sock. This way, the sock always stays in place without pinching. The socks have a flat toe area. This means there are no toe seams to irritate the skin.