MST172 Button-Up Side Shorts by Thom Krom in black, oil wash.
These shorts are not short on details: easy-waist (elastic and drawstrings), drop-crotch, zip back pocket with puller + side-strips of fabric with button fastenings that look good either up or down. All in a black, oil wash, tech-feel cotton / linen blend with some stretch.
The model is 180cm tall and wearing size M.
84% cotton, 11% linen, 5% elsatane. Machine wash cold.