The classic MA-1 sleeve pocket gets a new home:

Subtle military design cues work well.  Trust Japanese brand Digawel to do it right.

I find I’m always shoving my keys and store receipts in my MA-1’s pocket sleeve.  I don’t know how well a heavy set of keys would work in this pocket on a thin cotton shirt, but I could definitely puff it up real nice with a week’s worth of Starbucks and Costco receipts.  Flex smarter, not harder is what I always say.

$275 over at Maas And Stacks.