Check the listing for details. FirstGear 12V Heated Mens Base Layer Shirt Black. Color: Black, Condition: New with tags. Listed at 161.24 USD. Our Heat Layer Shirt features high tech, moisture wicking stretch fabric that has a close-to-skin fit to optimize heat transfer while reducing bulk. The garment is durable, hand washable, and extremely lightweight. Seven heat panels on the chest, arms, neck, and upper & lower back deliver more heat in more places than any other garment. Each zone can be adjusted to fit the rider's body. Our base layer garment design offers the greatest heat transfer performance with the least amount of bulk. Our heat panels have soft and flexible alloy/silicon, shaped for the maximum heat transfer. All this efficiency means less insulation and power is required to deliver and retain the desired heat to you below your regular clothes.