H.E.A.T. One-Layer is designed with the most merciless winter elements in mind. Our innovative system allows outdoor enthusiasts, adventurers, and workers achieve thermal equilibrium in subzero temperatures to maximize performance and provide superior comfort. H.E.A.T. One Layer features: -FabRoc technology - the most advanced and SAFE heating technology in the world. -Far infrared heat strategically placed to achieve thermal equilibrium. -iOS and Android App controlled system. -Magnetic batteries for wireless connection, ergonomically curved to comfortably fit your body. -Anti-microbial & moisture wicking polyester fabric. -Waterproof technology - machine washable & dryable. No more limits. No more boundaries. Choose your adventure. Gear up, Heat up.