A minimalist, performance driven sock designed for athletes seeking optimal warmth and comfort without bulk; Surround Heating Element envelopes the toes; Ideal moisture transfer; The "Welded" wires allows for a seamless sock for a better fit with more comfort; Compression: gentle - PFI 30, 5 - 10 mmHg; Material: 40% wool (merino), 35% polyamide, 25% elastane; Heat socks Only