No SlipThe underside is a super grippy textured foam surface. These things seriously don't budge!No StinkFLAT SOCKS create a moisture-wicking barrier that saves your shoes from becoming a stinky swamp!No ShowWhile you're out rockin' your FLAT SOCKS, they're your shoes best-kept secret!Modest Design, but a Great Personality Do your shoes speak enough for themselves? Thats 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 knit micro-pileshop all micro-plush FLAT SOCKS