What Our Gearhead(R) Experts Are Saying: "This tank is a go-to for warm-weather hikes and casual days. The organic cotton is super soft and breathable, and the racerback gives me great mobility whether I'm climbing or just lounging post-trail." We love pieces that move with us from trail time to downtime, and the Mammut Core Tank Top fits right into that rhythm. Part of Mammut's classic logowear collection, this tank is made from 100% organic cotton for breathable comfort that feels as good as it looks. The racerback cut offers freedom of movement for hikes, yoga flows, or mid-summer climbing sessions, while the graphic-featuring a fresh take on the iconic Eiger north face-adds alpine character to our everyday rotation. Whether we're on the move or taking a well-earned rest day, this tank keeps things effortless and comfortable.