... , speeds recovery 3. never get mold Neck wrap herbal heat pack for cold or heat use1. Various sizes are available, multipurpose application2. . ... to relieve arthritis, muscles aches, soreness and stiffness. Designed for treating larger areas such as the legs, upper back, or ... needed, heat for 10 seconds at an interval until desired temperature is reached.To cold: put it in freezer for at least 2 ...