In reply to Jellington:
Somewhat useless but i get my underwear from the states a brand called "32 degrees", I have worn under armour and arc'teryx. Under Armour i just don't find support the goods too well and just smush it up against your body the fabric is okay but nothing special. Arc'teryx have amazing support and are really nice against the skin but they're really expensive and very delicate (get torn to shreds in the washing machine). 32 degrees provide good support and a really amazingly comfortable fabric, I have worn the same boxer briefs for a week straight and they still felt absolutely fine, if you have any friends in the states or know anybody travelling there get them to either send you some or bring back some in their luggage, they're the best everyday underwear i have worn. If you are getting them literally just for the alps and you don't mind spending the money arc'teryx are great.