Everybody does em, I reckon you need to try on for blazer /sports coat. Ralph and Hackett are always reliable. I was pretty happy with a cheap one I got from uniqlo a few years back.
Cotton or Linen?
Norse Projects
Apolis
Epaulet
Mr Freedom
Carrier
Old Town
Community Clothing
John Simons
Margaret Howell
Manufactum
Oliver Spencer
SEH Kelly
Who makes nice lightweight summer blazer jackets suitable for stylish men about town bromptoning between offices in London’s grimy hot summer?