Whether you're headed out on the trail for a few hours or an entire week, the Fjallraven Keb Wool Long-Sleeve T-Shirt has got your back--got it covered in breathable, moisture-wicking comfort. Made with ethically produced merino wool, this long-sleeve technical shirt helps regulate your body temperature, draws sweat away from your skin when you're hiking hot trails, and naturally resists the build-up of odor--so you can wear it multiple days if you're backpacking. Fjallraven designed this shirt with two jersey fabrics, adding nylon to the sleeves and back to increase wicking power and durability.