Proper selvedge jeans

Depends on the brand of course but let's take The Flat Head as an example (14oz, raw as standard most of the time).

Before you've even put them on it takes 2 washes to get the shrinkage out of the cotton. The build quality and dyeing process is so good that you loose virtually no colour from a 40 degree wash, no spin.

I stick to a hand wash, reasonably warm, non bio and a hang dry. Cotton and denim needs a tremendous amount of water to grow well. A wash to clean and rejuvenate goes a long way.