This midweight merino blend crew base layer features IntraKnit 3D-mapped construction for adaptive fit and ventilation. Body-mapped mesh panels enhance cooling and moisture management. Merino wool regulates temperature and resists odor. Polyester and elastane provide durability and four-way stretch for comfort. The slim fit fits easily under shells and packs down small. Suitable for skiing, hiking, mountaineering, or year-round layering.