This 3W ice pack is re-usable, clean, safe, and environmental-friendly ice pack with new leak-proof auto-sealing technology. The instructions are very easy to follow and are listed on the ice pack.

Features:
- Leak proof - The latest technology products will not have mucus after water absorption and will not leak out.
- Long lasting - Stays cold for whole day in insulation bags or box.
- The packs will stay frozen outside of a cooler for up to 2 hours, way longer than ice, way longer than traditional gel packs.
- Meets cooling needs without causing drips, leaks and wetness.