alienator said:Uhm, far better in what way?
From the Icebreaker website:
"Merino is much finer than traditional wool, and is technically more complex than synthetics.
Tiny overlapping scales case the fibre. They're hydrophobic (water resistant), like tiles on a roof. Inside it's a different story - the fibre is highly absorbent.
Merino wool is the most hydrophillic of all fibres and can absorb and release 10x more moisture than synthetics. Each fibre can absorb up to one third of its own weight in moisture without feeling clammy or wet to touch. It can then release this moisture into the atmosphere to keep you feeling warm and dry.
Synthetic fibres such as polypropylene or polyester have a much simpler structure. They are made from melting, extruding and setting a petrochemical-based product, similar to plastic. The fibre can't breathe, absorb or release moisture. When knitted into fabric, they are limited to one-way moisture movement, with limited breathability, which can create a chill zone when moisture sits on the outside of the fabric. Merino wool has the ability to absorb and release moisture, to cool or warm the body, thus regulating temperature.
You‘ll warm up quickly but not overheat due to the exceptional breathability of the fabric."
more here:
http://www.icebreaker.com/site/merino_benefits.html
Merino keeps you warmer when it's cold and cooler when it's hot. Plus it deals with sweat much better than synthetics and you can wear it for weeks before it starts to stink! (try that with synthetic!)
Just go into any sharp outdoor/mountaineering store and ask them. Merino is the fastest growing segment of the outdoor market right now for good reason.