Fit and Design: Durable, stretch-woven fabric is ultra-lightweight & lets you move 4-way stretch material moves better in every direction Mesh underarm panels for strategic ventilation Low-profile collar construction for zero distractions Rip stitch convertible sleeve construction so you can cut at the elbow seam for a short sleeve Front kangaroo pocket Technology: UA Storm technology repels water without sacrificing breathability Dual-layer ColdGear® shoulder & sleeve panels with ultra-warm, brushed interior