1 Pair Self-Heating Shaping Socks Pain Relief Thermal Circulation Sock Tourmaline Cold-Resistant. Features: Comfort & Durability, Self-Heating for Cold Weather, Therapeutic Benefits, Ideal for Outdoor Activities, Ergonomic Heat Distribution. Material: cotton + polyester + spandex. Size: one size (38-44). Weight: 40g. Color: Black, Red, White.