Is this worthwhile as a summer blazer? Unlined, 100% cotton, jersey weave. Warning: Spoiler! (Click to show)
It depends how warm 'summer' gets in Finland. I would suggest that will wear warm, be somewhat clingy as a fabric rather than draping, and generally not convey elegance. For something fairly informal for summer days I'd suggest linen is more suitable.
We usually only get a few days over 25 degrees celsius. Thanks for the input. You've confirmed my suspicions. I'll look for something in linen.