Special attention is going to be given to merino wool because it is a unique material. Fabrics such as cotton, spandex, and polyester are ones that you are probably used to when it comes to maintaining them. But, you may be a little uncertain when it comes to merino wool.
One big question is how often you should wash a neck gaiter that is crafted from this fabric. Thankfully, as a whole, merino wool is extremely easy to maintain, and because it is naturally resistant to both stains and odors, you do not have to wash it as much as you might think.
Honestly, you can wash it as much as you want, but a good recommendation is to do so after extensive wear (say several times in a year). If it begins to load up with sweat, it is time to wash it. However, merino wool is like a cat compared to a dog; in the sense that it will care for itself and you do not have to care for it always.