UA Storm technology repels water without sacrificing breathability . Breathable insulation paired with lightweight, smooth spacer fabric for just the right amount of warmth . Durable woven overlays for added protection & stretch. Secure, zip chest pocket . Reflective details . Loose: Fuller cut for complete comfort. Body: 91% Polyester/9% Elastane Woven: 87% Polyester/13% Elastane.