Introducing the Ten Thousand Mock Neck Midlayer: the perfect performance midlayer for warmups, cooldowns, and cold weather training sessions. Made with Polartec Power Grid™ fabric, it provides optimal warmth and breathability. Say goodbye to odor with its permanent silver ion anti-odor treatment. Need to pack it? No worries, it's packable into its integrated stuff sack. Keep your essentials close with a low profile cash/card pocket at the left chest. Stay dry and comfortable with its moisture-wicking properties. Lightweight and breathable, this midlayer is a must-have for your training gear collection.