No Slip The underside is a super grippy textured foam surface. These things seriously don't budge! No Stink FLAT SOCKS create a moisture-wicking barrier that saves your shoes from becoming a stinky swamp! No Show While you're out rockin' your FLAT SOCKS, they're your shoe’s best-kept secret! Modest Design, but a Great Personality Do your shoes speak enough for themselves? That’s great! Slip in these tastefully chic Solid Black FLAT SOCKS to any shoe to rock the day 100% with no socks. As low-key in design as they are low in profile, go sockless all day long with FLAT SOCKS - the NEW no show sock. Top Fabric Material: 100% polyester microfiber terrycloth shop all microfiber terrycloth FLAT SOCKS