The Smartwool Men's Intraknit Merino Sport Vest is designed to keep you fully engaged with all your outdoor activities. This vest is made of warm Merino wool and Intraknit™ technology with full articulation so you can amplify your movements during high-intensity activities. The front panel of this vest features wind protection, a ribbed back panel for mobility, along with breathable knit mesh ventilation so you can stay comfortable on the outdoor fields. The Smartwool Men's Intraknit Merino Sport Vest is the best way to gear up for all your cold-weather activities!