The women's long-sleeve base layer Thermowave Merino Aero is a premium first layer designed for demanding outdoor enthusiasts seeking the perfect balance between thermal insulation, breathability, and ultralight comfort. Crafted from 100% natural merino wool with a fabric weight of 165 g/m², it ensures optimal body temperature regulation all year round. Weighing in at approximately 140 g, this shirt is remarkably lightweight, feeling like an imperceptible second skin.

The secret to its exceptional comfort lies in the premium, ultra-fine merino fibers measuring just 17.5 microns, providing next-to-skin softness without any itching or irritation. Merino wool boasts natural antibacterial properties that effectively neutralize unpleasant odors, even during multi-day use. Additionally, the fabric offers outstanding moisture management and dries quickly, keeping you dry and fresh on every ascent.

A well-thought-out ergonomic cut follows the female anatomy, allowing unrestricted movement and effortless layering. Offset flatlock seams at the shoulders and sides prevent chafing when carrying a backpack, while an extended drop-tail back keeps your lower back reliably covered during intense activity. Featuring dependable UPF 30+ UV protection, this shirt is a versatile companion for hiking, trekking, ski touring, and travel in any weather.