The North Face M Summit Altimetro LT Crew men's long sleeve shirt

The Summit Altimetro by The North Face is a technical and lightweight men's long sleeve shirt, specifically designed to meet the rigorous weight requirements of mandatory gear for winter running races and training. Made with the innovative 190 g/m² DotKnit double knit fabric, composed of 90% recycled polyester, this shirt actively wicks moisture away from the skin, pushing it outward for immediate evaporation. The FlashDry-Pro™ technology ensures ultra-fast drying and superior abrasion resistance, while the body anatomy-based design integrates recycled polyester mesh panels on the back and under the arms to maximize breathability in high-sweat areas. The slim fit hugs the body, providing an aerodynamic profile and exceptional comfort even during prolonged use of a backpack, reducing chafing and the overall weight of the gear. The garment is enhanced with functional details such as technical holes in the overlay fabric for targeted ventilation, practical thumbholes that keep the sleeves in place, and heat transfer reflective logos to increase visibility in low-light conditions. With a center back length of approximately 71.7 cm and a sustainability-oriented construction, the Summit Altimetro represents the ultimate base layer for athletes seeking high performance, thermal protection, and moisture management on the most challenging winter trails.