A timeless knitted design. Mountain Top is crafted from our beloved ORIGINAL FIT style. It's a well-rounded base layer featuring a weightless build, thoughtfully-placed LIGHT cushioning areas, and the unique 'Y-Line' knitting technique that offers a personalized fit. Despite its name, this lightweight hiker is incredibly adaptable, cozy, and a favorite for various activities like hiking, running, walking, training, climbing, biking, and all-day wear!