Forget cotton. Merino wool t-shirts, sweat-wicking and BO-killing, are perfect for hiking, climbing, or traveling around the world.

Layering is not a complicated thing. It's the process of adding and removing layers of clothing to keep your body comfortable in changing weather and temperature conditions.

In fact, we found a stellar selection of 100% merino wool base layers on Amazon. From shirts to bottoms to two-piece sets, these pieces will help you stay cozy through the chilly months while always ...