There was a major emphasis on retro-looking denim on the S/S 20 runways. Jeans exuded an upcycled, lived-in vibe. If they look like they are straight from the vintage shop, then you nailed it.
Bermudas are not going anywhere, so go through your denim treasury and see if there is any tired pair of jeans that is looking to start a new, ‘shorter’ life.