2022 Hot Sell Price Concession Effectively Keep Warm for 8 Hours Hand Warmer Pad. Long-lasting Warmth: Effectively keeps warm for up to 8 hours, with gradual warming up to 12 hours. Versatile Application Areas: Suitable for knee, back, abdomen, waist, and shoulder use. Natural Ingredients: Main ingredient is Hemerocallis for gentle and effective heating. OEM and ODM Services: Professional manufacturer offering customization from samples and designs. Fast Sample Delivery: Sample orders processed within 1-3 days after full payment. Strict Quality Control: Environmental-friendly materials and skilled workers ensure high quality. Free Sample Availability: Free samples provided for checking and trial (shipping cost borne by buyer). Experienced Manufacturer: Over 17 years of experience in health care and beauty care products.