What Our Gearhead(R) Experts Are Saying:"I've worn this grid fleece crew on alpine tours, winter hikes, and even just lounging in camp. The grid interior traps heat but breathes incredibly well, and the merino blend doesn't itch or stink after long days out."Whether we're navigating icy ridgelines or waiting for sunrise at basecamp, the Heavyweight Antarctic Grid Fleece Crew keeps us warm without overheating. Built for high-output cold-weather adventures, this crew top combines bamboo derived rayon, merino wool, and recycled polyester for a soft, breathable baselayer that's engineered for performance. The interior grid fleece structure offers extra insulation while enhancing airflow, making it a versatile midlayer or base depending on the temps. With natural odor resistance from merino and quick-drying performance from recycled synthetics, this layer stays fresh and functional from first light to last tracks. The streamlined cut makes it easy to layer under shells, puffies, or bibs on any backcountry mission.