Salaryman cosplay: Onesie disguised as a business-suit

The Betabrand Suitsy is machine-washable and shuts with a zipper hidden behind the fake shirt buttons — add a tie and some smart shoes and you're dressed for success.

It combines Betabrand's soft dress-pant sweatpants with fake shirt-cuffs, hidden venting and an adjustable waistband, and can be altered to improve the fit. No one will know you're wearing a glorified romper suit while you cosplay a business-dude: "look professional but feel like you're in pajamas!"