Every wardrobe needs them, so we've got plenty: we're talking about plain trousers. Whether you're after a sleek tailored pair for the office or pocket-covered cargos for your next adventure, you're in the right place. We're talking grey, green, blue and more block colours, all ready to go. Looking for plain black work trousers? Keep an eye out for styles with pleated legs, handy belt loops and sophisticated twill fabric. Just add a white shirt to create a classic ensemble. When it's time to kick back, choose a pair of plain black men's trousers crafted from cosy cotton jersey for softness. Stretchy cuffs and waistbands offer a comfortable fit, while silver-tipped drawstrings add a dash of detail. Why not pick a matching overshirt to bring a coordinated effect to your laid-back look? Finish up with chunky trainers to get the full River Island R&R experience.