WHY BUY LEATHER? Water resistant/Our tests show that Nate's Leather Jackets will repel water for up to two hours before becoming saturated.
Fire resistant/Leather will resist burning which provides critical protection in case of explosion, vehicle accident or other emergency.
Abrasion Resistant/Tests by the U.S. Dot national safety administration involving officers falling have shown leather to be more abrasion resistant than any other known clothing material, including kevlar.
The random nature of leather fibers gives them an inherent strength that cannot be reproduced in a laboratory.
Windproof/Leather pores contract in cold wind, providing an effective barrier to inclement weather while holding in body heat.
As you can see there are many reasons to wear leather as opposed to other fabrics.