The Fieldsheer powered by Mobile Warming heating technology 7.4-volt Phase heated drawstring hoodie features a traditional pullover design. The outer shell is made from 100% polyester fleece with a polyester moisture wicking mesh liner. It includes a large hand front pocket with plenty of room for your phone or other items and rib knit cuffs and waist. The Phase heated hoodie uses Fieldsheer's powerful yet lightweight Mobile Warming 7.4-volt heating system with 3 heating zones, one on the back and 2 on the chest that keep your core warm. It can provide temperatures ranging from 135°F on high to 90°F on low. On high, expect up to 2 hours of heat and on low for up to 10 hours. The heat level is adjustable with a built-in waterproof touch control button and 4 heat settings. The 7.4V rechargeable Lithium-Ion battery is included along with an AC charger. You can expect up to 10 hours of power per charge.