... hot and cold application. We provide OEM service for this product. 1.Material:Nylon,gel 2.It's for armUsage:This non-toxic and ... cover pack completely with hot water and soak for 3 - 5 minutes. 2)To cold, place in freezer for one hour before using ... . Function:a).cold compress: physical therapy for traumatic hemorrhage, heatstroke, itch, headache, strain, scald and fatigue b). Hot compress: alleviate ...