I bought two of these shirts to take on my trip to Australia returning via Hong Kong with just carry on. In extreme heat, the worst humidity Hong Kong has experienced since records began & much walking since in the UK Germany they have performed brilliantly.
On the big trip they were the most comfortable of the range of shirts I took with me & bought out there. I could wear them for a couple of days without a wash if necessary & they didn't stink plus looked smart & fresh.
I bought them from a physical store in Fort William as I wanted to try them on pre-purchase - iIdon't believe it's right to try on in a store then buy online. I'm 5'10" & hover under 80KG. I fitted into a medium but went for large as it gave me more freedom across the shoulders - something I need as I've been working out pretty consistently for several years now. (Not huge, just toned.)
Pricey for a simple T but worth the money for my use case & I'd buy more & recommend them without hesitation. Another top Montane product - I'm starting to look like an advert for them when we're on the hill.