The complete high-performance heated jacket: Graphene-infused, lightweight, waterproof, breathable, durable, with 10 smart pockets!Introducing Gamma, the ultimate all-climate jacket. Gamma Jacket is a durable, lightweight, insulated jacket that doesn’t compromise function or fashion. Building on graphene's amazing properties, Gamma is your everyday jacket, your travel jacket, your activewear, and your going-out jacket. Whether you are hiking in the mountains or popping into town for a coffee, the heat-insulating design will warm you up in a matter of seconds. Gamma is the only jacket you’ll need all year round, all around the globe.Size Chart ChestHipsSleeve LengthMen's 2XSWomen's XS30 - 32 inches29 - 31 inches32 inchesMen's XSWomen's S33 - 35 inches32 - 34 inches32.8 inchesMen's SWomen's M36 - 38 inches35 - 37 inches33.5 inchesMen's MWomen's L39 - 41 inches38 - 40 inches34 inchesMen's LWomen's XL42 - 44 inches41 - 43 inches34.8 inchesMen's XLWomen's 2XL45 - 48 inches44 - 46 inches35.5 inchesMen's 2XLWomen's 3XL49 - 52 inches47 - 49 inches36.3 inchesMen's 3XLWomen's 4XL53 - 56 inches50 - 52 inches37 inchesOur items are unisex, though the cut is primarily based on a men’s cut.Our sizing is closely based on North Face Men’s sizing for both jackets and shirts.100% Graphene-InfusedSmart Customizable Built-In-HeatingUniform Heat DistributionMultifunctional with 10-Pockets SystemUltralight and ThinAntimicrobial and Anti-Odor Graphene Powered LayerBreathable and Moisture Wicking1-Year Warranty