Put simply Merino is the goods.
Due to its extremely fine fibres it has some great benefits for the outdoorsy types among us and for anyone living anywhere chilly.
It won't smell.
Merino has all sorts of funky anti-bacterial properties built into it which serve the purpose of making sure those sweaty under-arms don't cause the shirt to smell. The main ingredient that helps this is called lanolin, which is actually sheep fat. (not quite but sounds pretty crazy right?)
It wicks away moisture
Getting back to those sweaty under-arms, merino wool is hydrophobic (repels moisture) on one end and hydrophilic (absorbs moisture) on the other end. What this essentially means is that it repels moisture on the outside and pulls moisture away from the skin on the inside keeping you sweat free.
It regulates Temperature
Merino is excellent at regulating body temperature. Because merino is so fine (damn fine, you might say) it has more trapped air bubbles per metre than an equivalent fabric, thus creating the ultimate heat trapping and releasing mechanism.
It is Biodegradable
Due to the fact that merino’s base ingredient is keratin (like a rhino’s horn or human hair) it is completely biodegradable. So if you ever do ruin and then dispose of your merino clothing (due to the gnarlyness of your activities obviously) it will breakdown and decompose releasing vital nutrients back into the soil, acting like a fertiliser.
It is very soft.
Because the wool fibres of merino are so darn thin they are much more comfortable (about a million times more) against the skin than regular wool (you remember those itchy jumpers Nana used to make) they are so fine in-fact that dermatologists have even proven that merino can make our skin softer. How neat is that?