Core Materials
- Outer shell: Made of ABS material, sturdy and durable
- Inner layer: Flexible TPU material, skin‑friendly and snug‑fitting
- Filling: PCM phase‑change cooling liquid for professional temperature control
Product Specifications
- Size: 17×4.3×3 cm
- Weight: About 300g, lightweight with no burden
- Colors: Black, White
- Melting point: 28°C for precise temperature control
Cooling Principle
- It crystallizes naturally at 28°C and remains solid at room temperature.
- When worn, the PCM cooling liquid absorbs body heat and changes from solid to liquid, removing surface temperature from the body.
- It refreezes automatically when placed in an environment below 28°C for repeated recycling use.
Product Advantages
- Long‑lasting coolness: Efficient heat absorption and cooling to deliver long‑term refreshing sensation.
- Soft and skin‑friendly: Comfortable to wear without skin pressure, ideal for daily trips, commuting and outdoor activities.
- Reusable: No charging required.
- Easy to clean: The surface can be wiped directly for simple maintenance.
- Convenient to wear: Circular design fits the neck closely, non‑stuffy and unrestrictive.








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