Wick Dry?? technology & soft Merino wool combine with gentle compression and shin/sole cushion to keep feet & legs warm, dry and happy no matter the task. Contoured rib top and spandex compression zones add support and keep sock in place all day long. Mesh panels vent moisture while trapping heat inside. Reinforced toe and heel add comfort and longer product life. 38% nylon, 30% Merino wool, 30% acrylic, 2% spandex. Lightweight.