Factory Wholesale Alleviate Elbow Hand Legs Cold Keep Warm 12 Hour Warm Hand Pads. 12-Hour Warmth Duration: Provides continuous warmth for up to 12 hours after exposure to air. Multi-Part Application: Suitable for use on knees, back, abdomen, waist, shoulders, and hands. Natural Ingredient: Main ingredient is Hemerocallis, a natural plant extract. Free Sample Availability: Free samples available for checking and trial; buyer covers shipping cost. Experienced Manufacturer: Professional manufacturer with over 17 years of OEM and production experience. Strict Quality Control: Environmental-friendly materials and strict QC at every production stage. Fast Sample Production: Sample orders shipped within 1-3 days after full payment receipt. OEM Service Available: Customization available from samples and designs with experienced engineers.