Letang is clearly partial to the vintage look, and is a fan of the old triangle robo-pigeon logo. I don't think the team currently sells any other merch with the old logo, so it's interesting to see that make a comeback:
Schultz also went with some old logos for his designs:
Murray's designs are interesting, going with a more subtle look for the beanie and incorporating the keystone shape for his baseball hat:
Like Murray, Rust went with the diagonal "Pittsburgh" logo:
The hats can be found here or in person at the PensGear stores. The Penguins Foundation will receive 10 percent of proceeds from sales.