With two heating elements in the kidney and back area the Lenz Heat 1.0 Women's Vest is going to change your relationship with winter! Get out there and don’t care with a vest designed to support a long battery life and temperature regulation that puts you in the driver’s seat of winter weather. This is a Four-way stretch fabric supported by elastic seaming to give you mobility and a comfortable fit cut from a wicking and breathable fabric to move perspiration, dry quickly, and keep you core comfortable. And best of all, of course, warm! Banish the winter weather in a layer that not only fits perfectly under your winter outer layers, but has a wind and water repellent shell fabric for stand-alone wear during the shoulder seasons. Not just for skiing, now you can attend winter and shoulder season sporting events in smugly comfortable from the frosty seats. The real surprise in this vest is it is machine washable to 86°F. Press studs for all Lenz rechargeable lithium batteries (sold separately) take the same batteries as you use for your socks and gloves for a modular, interchangeable, system you can customize to meet the demands of your day. Light warmth, mid, or high, whether you’re in motion or sitting still this brings comfort to the cold so you can stay focused on the fun.