Thermofabric™ is opaque (you can't see through it easily) and is ideal for athletics, leisure, and work. Thermofabric is thin and breathable; it promotes rapid evaporation of perspiration. Dryness keeps legs and feet cool in summer, warm in winter, and comfortable all the time. Dry feet also inhibit bacteria growth and consequently minimize foot odour. Perfect for cooler weather, they provide some warmth outdoors, but aren't too hot.