Reference article
Tuxedo
Tuxedo is an appearance option in the Mountains shop.
Obtaining it
Buy it from the 
Mountains shop with 
Coins.
Use
Assign it to a duck to change its appearance. Appearance items do not improve racing skills.
Duck preview
Reference article
Tuxedo is an appearance option in the Mountains shop.
Buy it from the Mountains shop with Coins.
Assign it to a duck to change its appearance. Appearance items do not improve racing skills.