Handle weather like a champ with this super cool blackwatch rain slicker from the guys over at Amercian Trench.
It weighs only 12 ounces and packs small, so it's easy to travel with or keep in your desk or car for those unexpected showers. It also, most interestingly, goes away with the S-M-L-XL sizing chart for suit-style sizes. In between a medium and a large? No longer. 40R it is.
The kind of wardrobe essential every guy needs to have on hand, you can get this in your life for $349.