Even though summer is right around the corner, mother nature always loves to throw us a curveball once and awhile. Mission Workshop's Interval Vest is perfect for just that, a lightweight layer that is portable and packable with a technical construction that shields you from wind and rain. It's also breathable, which is ideal for those temperamental summer days and it's got a good bit of stretch, perfect for when you're on the move. 

$135, missionworkshop.com