What Our Gearhead® Experts Are Saying:"This t-shirt is a daily essential for me—super soft and light, making it perfect for everything from crag sessions to relaxing on the patio. The fit is spot on, and it’s great knowing it's made from 100% organic cotton. I especially love how it layers under my climbing gear without any bulk."We always need a trusty t-shirt that’s as comfortable on the trails as it is around town. The Mammut Core Logo T-Shirt is that piece—a classic cotton staple that brings soft, organic comfort to our everyday adventures. Lightweight and breathable, this shirt slides effortlessly under a harness or layers up when the evenings cool off. We wear it when climbing, hiking, or simply soaking in the mountain air, knowing it’s built to last and designed to keep us moving freely. In the Mammut Core Tee, every day feels like an invitation to explore.