Fieldsheer Women's Merino Heated Base Layer Long Sleeve Shirt - Designed for versatility, wear this as a base layer to deliver unparalleled levels of warmth and core comfort. Heavyweight Hooded Base Layer; Merino Wool; Contour Fit Hoodie for extra warmth; In-seam Thumb holes on cuffs; Pockets - Waist / Chest; Multi-Zone Heat Elements: 2x Chest & 1x Back; MW Connect Mobile App Compatible; Integrated Touch Control Button; 4 Selectable Heat Settings; Powersheer Standard 7.4volt Rechargeable Lithium-Ion Battery; Up to 10 Hours of Power Per Charge; Universal USB Charging Input; UL/CE certified; USB Cable included; Charge Time 3-4 hours; Style: MWWT14010;