Whether you're venturing into frigid conditions or staying indoors cozied up by the fireplace, the Smartwool Men's Sparwood Stripe Crew Sweater is your cold-weather companion. This sweater is crafted from Smartwool's proprietary combination of recycled polyester with Merino wool and nylon. Both comfy and eco-friendly, this material blends polyester's durability with Merino wool's odor-control benefits.