What Our Gearhead(R) Experts Are Saying: "This grid fleece crew is insanely warm without the bulk. I wear it for ski touring in negative temps or under a shell on storm days. It traps heat and breathes when I'm on the move."From icy chairlift rides to high-alpine start lines, the Men's Heavyweight Antarctic Grid Fleece Crew is Le Bent's warmest base layer top, designed to keep us toasty in brutal cold without overheating when the pace picks up. Constructed with a grid fleece interior, this heavyweight layer traps insulating air while promoting airflow, so we stay warm and dry during backcountry laps, alpine ascents, or freezing resort days. The unique blend of rayon, merino wool, recycled polyester, and elastane delivers buttery-soft comfort, reliable moisture management, and full mobility. Whether you're chasing powder or bundling up in basecamp, this is the top layer we trust when winter shows its teeth.