The Balega Hidden Comfort Tab Running Sock has elastane throughout for a more structured hold providing a second skin fit. A seamless toe, under sole cushioning, and mesh ventilation panels will keep your feet dry and comfortable while you run.Medium volume construction - not too little, not too much, just right.White, Charcoal: 84% Drynamix® polyester, 14% nylon, 2% elastane.Candy Pink, Zesty Lemon, Cranberry: 84% Drynamix® polyester, 11% nylon, 3% Neofil®, 2% elastane.8025.