I went to what a colleague at work called an "old man's shop" today to buy shirts and pants.
I've been buying them at a big chain so far, but I'm unhappy with the quality. The buttons are poorly sown and fall off sometimes and the fabric in the pockets is thin and tears easily.
Since I bought a very durable umbrella at a similarly old shop in London, and later a pair of leather shoes at a shop here in Oslo, I've been seeking out such shops more. It's more expensive, but the quality is higher.