It&';s true: some layers do it all. The WindStop(TM) Cocoon delivers warmth and weather protection without the bulk. Together, cozy HeatLock(TM) fleece and strategically mapped WindStop(TM) panels produce warmth that shields, moves, and still feels light enough to run free. Meet your all-in-one solution for mid and outer layering. We love it for: cold weather running in the wind and rain HeatLock(TM) body: 77% polyester & 23% spandex Knit fleece with smooth outside & warm, brushed inside Lightly compressive PFC-free durable water repellent finish (80/10) WindStop(TM) panels: 85% nylon & 15% spandex Wind-resistant, water-resistant, lightweight & smooth 0.23 clo (thermal insulation) Semi-relaxed fit Convertible turtleneck to hood with mask Ponytail opening at the back of hood Laser-cut perforations in mask Ergonomic seam placement Watch windows Thumbholes Reflective bars & logos Machine wash cold, tumble dry low, don&';t bleach Designed in California, made abroad