2022 Hot Sell Factory Wholesale Reduce Cold Keep Warm for 12 Hours Hand Warmer Pad. 12 Hours Warmth Duration: Provides continuous warmth for up to 12 hours after exposure to air. Multi-Part Application: Suitable for use on knee, back, abdomen, waist, and shoulder areas. Natural Ingredient: Main ingredient is Hemerocallis for natural heat generation. OEM and ODM Services: Professional manufacturer offering customization from samples and designs. Fast Sample Production: Sample orders ready in 1-3 days after full payment receipt. Strict Quality Control: Environmental-friendly materials and skilled workers ensure high quality. Free Samples Available: Free samples provided for checking and trial (shipping cost by buyer). 17 Years Experience: Over 17 years of OEM and production experience in health care products.