Unlike Equestria, creatures that live on other continents wear clothes, they can at least wear a hat or scarf on them, but some wear full clothing or armor, this is the case of Duststrife
 
Rangers did not tend to favour metal armour as the weight of it would have been a burden rather then a help. This was no different for Duststrife, and was also this reason he did not wear a helmet.  
Instead, Duststrife was clad in a fine linen shirt with delicate embroidery; likely to have been made in Draifyia. Over his shirt Duststrife wore a sleeveless jerkin, made secure by braided cord ties. A coat of thicker and stronger leather went over this. Its sleeves were stitched along the underside of their lengths and also at the shoulders. This would have made it possible for the sleeves to be removed if needed. He wears from his loins to his hock pants and on his back legs leather boots in order to protect them. Duststrife carried with him a cloak and when it was not needed to it was rolled up and carried upon his back.
 
Duststrife carries many items while on the move, including a variety of weapons.