Your complete guide to Merino wool.

What is Merino wool made of? Proteins composed of amino acids and natural components. Merino wool is a natural, renewable sheep-grown fiber. Sheep grow new wool every year—just like their human hair—allowing them to have their own renewable resource. This means when garments have reached the end of their life, they can decompose without leaving harmful effects.  

What is Merino wool great at? Helping keep your body at a stable temperature. When it’s cold outside, the natural crimp of wool fibers helps trap air, insulating you. When it’s warm outside, it transports sweat away from the skin, helping to keep you cool and dry.  

This benefit of wool can get a bit technical—bear with us. Merino wool transports sweat and moisture away from skin so sweat-free fibers are instantly produced. Wool wicks moisture and transports it to the exterior of the fabric, where it can evaporate.  

When it’s cold outside, one layer might not be enough. By using wool in layers, you create an escape route for sweat—and excess heat—back out of the garment. This strategy helps regulate temperature and keep you comfortable.

Merino wool is unique in that it absorbs odor caused by bacteria—trapping those small molecules within its fibers. This helps garments stay fresher longer, meaning you may not have as much need to wash them.  

Soft is what Merino wool is best known for. Its fibers are much finer than traditional wool, making them feel soft and smooth against skin.  

Merino wool disappears after about 12 months in the ground. Most Merino wool fibers will naturally decompose when exposed to moisture, oxygen, and bacteria.  

Most outdoor gear sparks at less than 600°C. Merino wool naturally resists flames and will only melt at much higher temperatures.