Renowned for its workwear since opening its doors in 1997, New York-based Theory is an expert when it comes to shirts. If you’d like proof, just take the label’s latest design. Whipped up from a lightweight fabric and shaped to a relaxed silhouette that’s primed for keeping you comfy at the office, it’s topped with a spread collar before falling into long sleeves. Slip it on before important boardroom meetings – and post-work dinner dates.