100% polyamide fabric with water-repellent cire finish. Rechargeable copper heating zone to regulate your temperature. Power Bank Battery Operated* Warmloft 170gsm body insulation. Grown on insulated hood with adjusters, and elasticated cuffs. Inner mobile phone pocket and battery pocket. Charge your phone on the go. 2 zipped lower pockets. Concealed zip in lining for embroidery access and shock cord adjusters at hem. Battery pack sold separately.