The North Face Summit Altimetro LT Crew

The Summit Altimetro LT Crew is a lightweight, breathable base layer top designed for high-output mountain days. Its quick-drying knit helps regulate body temperature during demanding ascents, while the crew neck and clean silhouette layer comfortably under a midlayer or shell. The fabric moves with you, providing freedom through the shoulders and torso when reaching for poles or navigating mixed terrain.