What's so great about Merino Wool?
Over the last few years, merino wool underwear has developed an exceptional reputation for it's long-term comfort and performance in cold environments - especially it's ability to resist the build-up of odour and regulate body temperature better than it's more widespread synthetic alternatives.
What are it's advantages?
• It naturally resists the build-up of bacterial which cause your baselayer to stink - even for extended periods of wear (some claim up to 90 days with no nasty niffs). This is a property inherent to the merino wool fibres, and not the result of any kind of extra treatment or process.
• By absorbing moisture into the core of it's individual fibres, merino wool can absorb sweat, without feeling wet to the touch, and then release it slowly, avoiding the rapid cooling that can occur with synthetic fabrics.
• Not just the fabric, but the fibres themselves are breathable, aiding comfort and reducing clamminess and overheating.
• The combination of moisture absorption and release, and fibre breathability mean that merino wool garments help to regulate body temperature, naturally warming and cooling the body in response to different climates and different work-loads.
• It's 100% natural and bio-degradable. Aside from any chemicals that may be used during the processing of the wool (cleaning, dying, etc), it is a very environmentally friendly product. Patagonia use no chlorine in the processing of their merino wool garments.
• Due to it's very fine fibres (much thinner and smoother than normal wool fibres), it is very soft and comfortable to wear next-to-the-skin, even for those who experience irritation from normal wool.
• It will not melt or burn like synthetic fabrics - a serious consideration for armed forces personnel and bushcraft enthusiasts.
• No static - no clinging or sparks.
What are it's drawbacks?
Compared to synthetic baselayer fabrics, merino wool is:
• Noticeably heavier (though not necessarily noticeable when being worn).
• Slower to dry.
• Much more expensive (Patagonia merino wool garments are about twice the cost of their synthetic Capilene baselayer garments).