Here's something for added warmth when the job or the weather puts you in the coldest conditions: Carhartt's Force Jennings Neck Gaiter. It's made of a 92% polyester/8% spandex fleece blend that breathes for comfort but holds in the warmth you need. One-size-fits-all. Add plenty of warmth around the neck without any feeling of tightness or constricted movement.
Carhartt Force fabric wicks away sweat with FastDry technology for comfort and its anti-microbial finish helps fight odor. Fabric-tested and job-tested -- or it wouldn't have the Carhartt logo on it.