Hot Chilly's Waffle Crewneck uses technical microfibers blended with their natural Bio Del Mar antimicrobial protection to offer a thermal that's warm, manages moisture, and resists odors. This is a versatile mid-weight thermal you can use in a range of winter sports. And, thanks to the old-school waffle knit and contrast stitching, this is also a thermal that works well as a shirt on its own. On Hot Chilly's heat scale from 1 (cool) to 10 (hot), this crew scores a 7.