Office-dwellers, listen up! Proper-chic clothing empire Theory is throwing open the gates to its end-of-season sale today, where almost all spring/summer apparel and accessories will be a whopping 50% off. We checked out the offerings on Maiden Lane yesterday and spied a beautiful minimalist maxi-dress with a to-die-for open back (now retailing for under $150!), some sweet pleated shorts, simple go-with-everything blouses, and ankle-grazing trousers that make just about anyone's bum look better. The sale also includes pieces from the Olivier Theyskens' Theory collection that start at a mere $45. Check it all out in-store or online.