Works with or without a Smartphone. Up to 10 Hours of warmth. 4 Heat Settings.
ActionHeat 5V Heated Base Layer Pants for Men
Primer Plus Heated Base Layer Top with Bluetooth
Primer's Men's Heated Pants
Heated Thermal Underwear & Base Layers
ActionHeat 5V Base Layer Battery Heated Pants for Men w/ 3 Heat
Mobile Warming 7.4V Men's Primer Plus Heated Baselayer Shirt - The Warming Store
Men's Heated Baselayers
Battery Heated Outerwear Buyers Guide
Mobile Warming Men's Heated Primer Baselayer Shirt, Black, Small
ActionHeat 5V Heated Base Layer Pants for Men
Men's Heated Baselayers
MOBILEWARMING Primer Men's Heated Tights Baselayer