Nexgen Heat MP7922FMSET Black 'Heated' Balaclava (Rechargeable Battery Pack Included) Features Made of Soft Durable Poly Exterior Material Dual Side Ear Warming Heating Elements Easy to Adjust for Full Head Coverage or Wear as Face Mask Powered by 7.4V Rechargeable Battery Pack Included: Twin Batteries & Wall Charging Kit 3 Heat Settings: (Low-95f, Medium-105f, High-120f) Designed to be Lightweight Can be Worn under Any Hat or Helmet