6.
Socks do not generate heat on their own, they retain heat through
friction between the bottom rubber liner and the sole
Specification:Material: cotton + polyester + spandexSize: one size (38-44)Weight: 40gColor: Black, Red, WhiteTips: - Heat socks need to be washed by hand, quickly, not for a long time in the water (to prevent damage to the heating point), wash with flowing warm water, do not use detergent.
30 dys money back guarantee. Returned items must be in original condition and packaging. Buyer pays return shipping. No refunds issued unless items are returned.