The **Winter Self-Heating Socks** you’re referring to offer a unique blend of warmth, comfort, and health benefits. These socks are unisex and use special materials, like tourmaline, to create a self-heating effect. Here are some key features of these socks:

1. **Self-Heating Technology**: 
   - Often embedded with tourmaline in the fabric, which can generate heat through natural body movement and improve blood circulation. The heat helps keep feet warm without the need for external heat sources.
   
2. **Anti-Freeze Protection**: 
   - Designed to prevent cold feet even in freezing temperatures, making them ideal for winter activities like hiking, skiing, or just daily use in cold climates.
   
3. **Foot Massage Effect**:
   - The socks often have textured surfaces or strategically placed materials to provide a massaging effect with each step, promoting blood flow and reducing fatigue.

4. **Breathable Material**:
   - Despite their thermal properties, the material is designed to be breathable, ensuring moisture and sweat don't build up, which helps maintain comfort for long wear.

5. **Cozy Fit**:
   - Made to be soft and comfortable, these socks usually feature cushioning and are designed to stay snug, reducing slippage inside your shoes.

6. **Tourmaline Benefits**:
   - Tourmaline is known for its ability to emit negative ions and far-infrared rays, which can be beneficial for promoting circulation and relieving muscle soreness.

These socks are great for anyone looking for warmth, comfort, and a bit of therapeutic support during the winter months!