Timbuk2 knows that sometimes you need a messenger bag and sometimes you don’t. So they created the Hidden Messenger. It’s a small messenger bag (12.40″ x 6.49″ x 4.92″ in) made of 90% recycled PET rip stop fabric that folds down into a small zippered pouch when it’s not being used. It’s 100% machine washable and is available in 4 colors. You can purchase it for $30 from Timbuk2.