ScentLok BE:1 Trek Heated Base Shirt - Men's Medium Blackout Black 1409324. Built with Carbon Alloy Silver Alloy and Fusix technologies this ultra-soft merino wool blend shirt delivers maximum odor adsorption bacteria defense and stretch performance. Integrated heating elements provide three levels of on-demand warmth activated by an easy one-button control and powered by a built-in USB cable compatible with any 5V/2A battery (not included). The blackout design is ideal for blind hunting and the shirt?s moisture-wicking treatment ensures dry next-to-skin comfort in all conditions. The Trek Heated Base Shirt is the ultimate cold-weather base layer for focused scent-conscious hunts. Specifications for ScentLok ScentLok BE1 Trek Heated Base Shirt Blackout 1409324: Manufacturer: ScentLok Men's Clothing Size: Medium Apparel Fit: Athletic Color: Black Women's Clothing Size: Medium Size: Medium Features of ScentLok ScentLok BE1 Trek Heated Base Shirt Blackout: Carbon Alloy technology for maximum odor adsorption and scent control Silver Alloy treatment to inhibit bacterial growth Fusix technology for odor control and enhanced stretch Merino wool modal and Tencel blend for ultra-soft flexible fabric Built-in heating elements with three adjustable heat settings Sleek one-button control with glowing ScentLok ?S? icon Upgraded USB plug located in side pocket Compatible with any 5V/2A battery or power bank (not included) Blackout design ideal for blind hunting Moisture-wicking treatment for superior moisture management Critical base layer piece for cold-weather hunts Recommended for use with 10000mAh power bank Package Contents: ScentLok ScentLok BE1 Trek Heated Base Shirt Blackout