ORORO Heated Hoodie with Battery Pack (Unisex) 60% Cotton and 40% Polyester SIZE AND FIT: Unisex; Relaxed fit; Model (Men) is 6'2" and wearing a size Medium; Model (Women) is 5'10" and wearing a size Small. HEAT ACROSS BODY: 3 carbon fiber heating elements generate heat across core body areas (left & right chest, mid-back); Adjust 3 heating settings (High, medium, low) with just a simple press of the button. QUICK AND LONG-LASTING WARMTH: Heat quickly in seconds with 7.4V UL/CE-certified battery; Up to 10 working hours; USB port for charging smart phones and other mobile devices CASUAL DESIGN WITH BREATHABLE FABRIC: Quality cotton fabric exterior with fleece lining ensures you don't lose any excess heat and enjoy comfortable warmth. For optimal heating experience, wear the hoodie under a lightweight jacket to trap the heat in, so the heating elements work more efficiently. NO WORRIES AT ALL: Easy care; Machine washable; ONE YEAR WARRANTY covered. A: To keep it at peak performance, you should fully charge your battery  before you use it or store it and then once every 3 months after you  store it for the season. A: Yes. There is a USB port on the battery for charging your phone and other electronic devices. A: Yes.  All ORORO heated apparel is TSA-friendly.