Womens 1" Penguin SM/MD 75% moisture wicking micro denier acrylic, 15% nylon, 10% spandex for exceptional comfort and strength Mesh upper above your foot allows maximum ventilation and breathability Easy fit cuff features a non-binding cuff Stretch -to-fit, 2 size system Warm weather sockItem SpecificationsColor: White/BlackSize: SM/MDUPC: 875621007215MPN: PENGUNSold as a PAIR