Three adjustable heat modes Mild, medium, and settings provide warmth for comfort and relief from cold. Safety and materials Builtin overheat protection and fault protection for safe operation. Made from friendly materials including aluminum, ABS, and PC for durability and reliable use. Rapid heating technology Delivers warmth quickly, helping you feel comfortable in cold conditions within moments. Flexible split design Can be used as a single unit or split into two separate packs, offering flexible configurations for home, office, or outdoor tasks. Key benefits heat levels to match your needs Fast warmup and steady heat Safe operation with protective features Versatile use as a single unit or two packs Durable construction from aluminum, ABS, and PC Use scenarios At home after a workout: place on back or shoulders for targeted relief. Office or commuting: deskside warmth on cold days; split into two for bilateral warmth or shared use. Outdoor activities: keep in your backpack during camping or winter walks for instant warmth when stationary. Product details Modes: low/mild, medium, Design: split into two packs or used as one Materials: aluminum, ABS, PC Safety features: overheat protection, fault protection