It's the lightweight jacket you can actually work out in. That's because the insulation adapts to your activity level, so as you heat up, it lets out warmth. ColdGear® Reactor intelligent insulation adapts to any activity for non-stop comfort & total versatility Lofty insulation with quilting that traps heat, but still allows air to flow so you don't overheat UA Storm technology repels water without sacrificing breathability Smooth, stretch-woven body fabric is lightweight & durable Brushed panels offer extra breathability & warmth Roomy hood with adjustable bungee Shaped cuffs for added coverage & protection Secure, zip hand pockets Style #: 1355848 90% Polyester/10% Elastane Imported Fitted: Streamlined fit that’s not too tight or too loose. Garment should be washed & dried zipped up Machine wash cold on gentle cycle with like colors Do not bleach Tumble dry low Do not iron Do not use softeners