Okamoto Hakuraku Socks - Socks to Warm Your Feet and Prevent Heat Loss - Relaxed Soft Cuffs - For Home Use - 2 Pairs - Gray - 23~25cm Product Description Thoroughly retains heat. Warms your feet and prevents heat loss. The moisture-absorbing and heat-generating, heat-retaining material "Warm Wave" thoroughly warms your feet from the ground up. Relaxed soft cuffs for a gentle fit. Easy to use everyday. Color: Gray Warm Wave is a material developed by Toray Industries, Inc., Toyobo Co., Ltd., and Okamoto Corporation. By mixing the heat-retaining functional fiber "Torcon(R)", the moisture-absorbing and heat-generating fiber "[eks(R)]", acrylic, and wool, it provides comfortable warmth. Product Information Material: Acrylic, Polyester, Synthetic Fiber (Ex), Wool, Synthetic Fiber (Torcon), Polyurethane Country of Origin: Japan Size: 23～25cm Color: Gray Features: Moisture-absorbing heat generation, heat retention, relaxed soft cuffs Color: Gray Pattern/Design: Solid Sock Length: Mid-calf Color: Gray Stains, tears, odors, etc.: None