FIELDSHEER Men's Merino 7.4v Heated Baselayer Shirt (MWMT14)

Heavyweight Base Layer; 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 available on App Store or Google Play Store; Integrated Touch Control Button; 4 Selectable Heat Settings; 7.4volt Rechargeable Lithium-Ion Battery; Up to 10 Hours of Power Per Charge