FLAT SOCKS are washable, reusable shoe inserts that replace socks. These soft, no-show sock alternatives keep feet comfy and shoes fresh—perfect shoe liners for women, men, and kids. FLAT SOCKS stay in place with a no slip underside. These non slip sockless shoe liners for women and men won't bunch up or show—great for flats, sneakers, boots, and casual shoes. These breathable sock liners for men and women wick moisture and fight odor. A fun, reusable, and washable alternative to socks, FLAT SOCKS keep feet dry and shoes fresh all day. With a slim 1/8”–3/16” profile, these thin sockless shoe inserts add comfort without crowding. Ideal shoe socks for women's flats, sneakers, and everyday wear. Includes trim guides for a custom fit. Small fits women's 6–11 / men's 6–10. Large fits women's 9–13+ / men's 8–14+. Perfect shoe liners for no-sock comfort.