The Salomon Shakeout Core Warm Tight uses a brushed jersey material to hold warmth through a cold start without trapping heat once the pace picks up. Moisture-wicking fabric pulls sweat away from the skin, and a water repellent finish blocks light rain along the way. A secure, bounce-free pocket keeps a phone in place through the miles. What Our Gearhead(R) Experts Are Saying:"I stay warm standing at the start line in cold air, then the tight keeps up once my effort climbs and I start sweating. That's the balance that keeps a winter run comfortable start to finish."