Reference article
Yeti Outfit
The Yeti Outfit combines Yeti Mask and Yeti Shirt into a complete look in 
Duck Life: Space.
Getting the outfit
Buy 
Yeti Mask and 
Yeti Shirt at 
Freez 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.