In an age when flexi-time, desk-side smoothie bars and even fun office slides are as common as ridiculous business jargon (but let’s take that ‘offline’, shall we? Urgh!), our working wardrobes need to loosen up. But how? The wise guy’s approach is to go for tailoring with unexpected details, paired with more casual elements – a sleek white trainer there, a smart cuffed jogger here, say. And who does that better than Jil Sander? The leather ‘belt’ fastening pictured here is exactly the kind of twist today’s workwear needs.