I wear a merino singlet, mainly because I can get them from Farmlands rural supplies outlet for under forty bucks. Icebreaker stuff is way overpriced and I don't see how they can justify their prices. Smelly Helly stuff is good and not too expensive, but only comes into its own if you are being very active and sweating a lot. When I was in the army I wore a cheapo poly pro/meraklon top, or just a poly cotton t shirt for days on end. I also had a polypropylene mesh t shirt and matching longjohns which where fantastic. I have just discovered they still do them...
http://www.brynje-shop.com/super-thermo-c12/brynje-super-thermo-t-shirt-p6944
and can't recommend them enough. You could walk in the longjohns without overheating because the air in your trousers "puffed" around your legs cooling you down. Brilliant! The pricing on the Brynje site looks pretty reasonable too. The one drawback is it does give you an all over fishnet look which can make you look like a deviant.... When I was at Sandhurst, my platoon Colour Sergeant came into my room as I was getting ready for a night exercise; at that point I was just wearing my Brynje long sleeved top and bottoms... His face was a picture of shock and horror as he exclaimed in his Glaswegian accent, " My God sir, ye look like something out of Frankie Goes To Hollywood!"
http://www.brynje-shop.com/super-thermo-c12/brynje-super-thermo-t-shirt-p6944
and can't recommend them enough. You could walk in the longjohns without overheating because the air in your trousers "puffed" around your legs cooling you down. Brilliant! The pricing on the Brynje site looks pretty reasonable too. The one drawback is it does give you an all over fishnet look which can make you look like a deviant.... When I was at Sandhurst, my platoon Colour Sergeant came into my room as I was getting ready for a night exercise; at that point I was just wearing my Brynje long sleeved top and bottoms... His face was a picture of shock and horror as he exclaimed in his Glaswegian accent, " My God sir, ye look like something out of Frankie Goes To Hollywood!"