UA Storm technology repels water without sacrificing breathability - Gerenous 1/2 zip front makes for easy layering 4-way stretch construction moves better in every direction Fastening: Zipper 1325277 Double-knit fabric is super-soft & comfortable - Elbow articulation & compression forearm sleeve for zero distractions Material wicks sweat & dries really fast 85% Polyester/15% Elastane