The-Heated-Longmen-Pants-are-very-versatile-and-are-designed-to-wear-under-other-garments-The-wonderful-wicking-ability-of-these-pants-make-it-a-great-layering-piece-and-a-must-for-any-long-term-exposure-to-cold-harsh-weather-The-garment-also-uses-antimicrobial-fabric-which-fights-odor-and-bacteria-to-keep-the-garment-fresh-Features-Stretch-Antibacterial-Fabric-Mesh-side-inserts-Three-heating-panels-lined-with-steel-alloy-fiber-elements-two-on-thighs-and-one-on-lower-back-Includes-1-7-4V-2-2Ah-Rechargeable-Lithium-ion-Battery-Includes-1-Single-Portable-Battery-Charger-Battery-provides-up-to-10-hours-of-heat-Full-Power-Setting-135-deg-F-ca-57-deg-C-lasts-up-to-2-5-hours-75-Power-Setting-120-deg-F-ca-49-deg-C-lasts-up-to-3-hours-50-Power-Setting-105-deg-F-ca-41-deg-C-lasts-up-to-5-hours-25-Power-Setting-90-deg-F-ca-32-deg-C-lasts-up-to-10-hours