Mod adds several models of saddles with different textures and saddle bags from game  "Witcher 3". 

To equip horses with these saddles you can craft them in blacksmith's forge / "Leather"
and after that cast built-in alteration spell "ElrianHorse: Change horse outfit" (spell is added to player automatically by mod) on any unmounted horse.
Choose a desired model from opened list (list contains only models, you have currently in your inventory) and click on it. 
Wait a bit while new saddle is applied. Old saddle will be added to players inventory  automatically.

You can use mod "Immersive Horses" to change saddles as well. 


Requirements:

SKSE
UiExtensions