UA Storm technology repels water without sacrificing breathability. ColdGear Reactor intelligent insulation adapts to any activity for non-stop comfort & total versatility. Smooth, ripstop woven front body fabric is lightweight & extremely durable. Knit fabric on side & back panels has soft, brushed "nodes" next-to-skin for the right warmth that breathes as you move. 4-way stretch construction moves better in every direction. Material wicks sweat & dries really fast. Secure, zip hand pockets. Reflective details for greater visibility on low-light runs. Interior hook closure on front zip. Shaped hem for enhanced coverage.