I bought one for my Mexico trip just before Xmas. Nothing revolutionary, but nice to wear I have used it with my BMW Streetguard 2 and it only took a couple of weeks to show wear where i sit Bottom line unless you take extra ordinary care: Nice but expensive in practical use
I use an Icebreaker Bodyfit 260 T Tech tops in the winter. It keeps you warm and you can wear it for a good few days withour washing it. I have tested it and it does this OK. It also has thumb loops which help to keep your wrists warm.
I am looking at getting one of their thinner tops for summer use.
I would recommend Icebreaker.
Other merino makes are Smartwool and Howies.
These Icebreaker® garments are gathering an almost fetish type following; with good reason.
I've had had my 260 top for 2 m/cycling winters plus at least 4 weeks worth of all day ski-ing. Smells better every time I wear it; wouldn't dream of washing it.
Well actually, No.
I have a Guernsey sweater I haven't yet washed in 32 years.
(Sir Peter Blake wore his Icebreaker® non-stop sailing RTW for 80 days 24/7; apparently every body said he smelt lovely too.)
The ultra light weight Icebreaker stuff is fine for summer wear up to about 20degrees C only. Above that temperature I'd rather to switch to Skins®. (Also a type of neat antipodean fetish wear.)