The Base Layer Bottoms Iceland Swears By In Iceland, they call them Básar tights—and there's a reason they're a staple in one of the world's most demanding climates. These base layer bottoms are crafted from 100% Merino wool that regulates body temperature by controlling evaporative cooling, keeping you warm when it's cold and cool when you're working hard. Soft next to skin with flat needle stitching for no-rub comfort, the Básar tights naturally move moisture away from your body. Equally perfect for backcountry missions or lounging by the fire after a long day outside. This is 66 North's foundation layer—the one that makes everything else work better. What Makes Them Special 100% Merino Wool: Natural temperature regulation and moisture management Flat Needle Stitching: Zero irritation, all-day comfort Icelandic Heritage: Proven in some of Earth's harshest conditions Temperature Regulation: Controls evaporative cooling naturally Soft Next to Skin: Merino's natural comfort without itch Moisture-Wicking: Keeps you dry from the inside out Versatile Comfort: From alpine starts to après relaxation Material 100% Merino Wool Care Instructions Hand wash or delicate cycle in cold water Hang dry No bleach, tumble dry, or high heat Perfect for: Ski touring, winter hiking, cold-weather layering, post-adventure lounging, or any activity where your base layer is the difference between comfort and misery.