The designers at luxury fashion house Balenciaga are taking "dress in layers" a smidge too literally with their Double Shirt.
The striped garment is part of their Men's Fall 2018 collection and features a long-sleeved shirt attached to a boxy, short-sleeved shirt.
But wait, there's more. They've designed it so if you decide to wear the long-sleeved shirt, the short-sleeved one hangs off the back. And if you wear the short-sleeved one, the long-sleeved one hangs off the front. So basically you're getting two shirts in one, which is good because the Double Shirt costs $1490.
If you're looking for a more economical shirt-on-shirt option, try their T-Shirt Shirt for $1,290. 
This gentleman decided on the shirt-shirt's DIY version: https://twitter.com/AH_Mike/status/1000890766053457920
I suggest pairing shirt-shirts with couture Crocs.
