Reference article
Nyan Duck Outfit
The Nyan Duck Outfit combines Nyan Duck Head and Nyan Duck Shirt into a complete look in 
Duck Life: Space.
Getting the outfit
Buy 
Nyan Duck Head and 
Nyan Duck Shirt at 
Mars Shop for 50 
Coins each. Equip both pieces on the same duck through duck selection.
Wearing the outfit
The hat covers the head, and the costume covers the body. Wear them together for the full outfit, or mix either piece with other clothing. Clothing does not improve racing skills.