Effects upon wearing it unknown
In addition to the Mawaru Penguindrum slippers and cushions and all the other character merchandise that Movic will be releasing, they have just added a replica of the Penguin Hat.
The one-size-fits-all hat will ship around January 19th 2012 and costs 2625 yen tax in.
The hat is made of stuffed animal materials and satin. The parts hanging off are represented in satin and the eyes are embroidered. Not mentioned in the item description is if anything happens when wearing the hat.
Now all that remains is for a company to sell the rest of the costume.