Green beer day is coming up quick, so make sure you're prepared with the proper attire. St. Patrick's Day Killarney Green Khakis ($100) from Bonobos are a good choice, with a curved waist band for a better fit and less bunching, a medium rise and cut, contrast pockets, and silly banana print liner. As a bonus, the killarney green color is sure to help cover up the stains when you end up spilling said green beer dodging the drunk jackass that just fell backwards in his barstool. We speak from experience.
Note: Bonobos sold out really quickly of the Killarney Green pants, but if you'd like to be notified when their next version comes out on Thursday (the Whisky Jars), sign up for the early notification by clicking the "Out of Stock in Your Size" button. They'll email you when the new pants come out on Thursday.