Everywhere you look, street style is bustling with leather trousers – all the cool girls are wearing them, dressed up, dressed down, with unexpected twists and turns. The most versatile trousers out there are your next perfect luxury secondhand investment. Ready for the latest leather fashion tips? Wide-leg leather trousers One of the trendiest fashion tips out there when it comes to leather trousers, the wide-leg version is office-appropriate – add a cashmere sweater, blazer, heels or slingbacks, and a…