Merino is in our opinion easily nature's finest performance fabric. We use 17.5 micron yarns, because the finer yarns are softer and just plain beautiful to touch. We use 200gsm fabric, which is a bit heavier than what most merino brands use for this type garment, because it has a wonderful hand feel and is a bit more durable. We source it from New Zealand, using Zque certified wool, where it is knit into a single yet gorgeous jersey.
Merino has the incredible ability to suck moisture into the very core of the fiber. This pulls moisture away from your skin cooling you as you exercise, and allows the fabric to keep breathing if it gets wet. As the temperature cools the natural crimps in the fabric insulate you, merino simply is more comfortable in a wider range of temperatures than anything else we know of.
Merino also takes color incredibly, and since it has a natural UV resistance it hardly fades at all. We have four year old, well worn, black merino tees that are still darker and richer in color than brand new cotton ones.
One word of warning though, premium low micron merino is addictive. Once you get a taste of the merino quality it's hard to quit. Luckily its natural bacteriostatic properties make it highly odor resistant. You'll find you can get a lot more wear between washes, a good thing as ultrafine merino does not come cheap.