Reference article
Explorer Outfit
The Explorer Outfit combines Explorer Hat and Explorer Shirt into a complete look in 
Duck Life: Space.
Getting the outfit
Buy 
Explorer Hat and 
Explorer Shirt at 
Earth 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.