Our luxurious silk sock is made by 100% silk. Light weight for summer, or as an extra sock liner for winter. It's supremely comfortable and feels soft and smooth against your skin. Machine washable, quick drying and won't ladder. silk is a natural insulator providing thermal warmth in cooler temperatures, and releasing warmth to keep you cool when it's hot. Silk aslo is highly breathable and draws moisture away, releasing it into the air, to keep your feet dry and comfortable. It is well suited to sensitive skin.