These jeans are made of Zylon. Zylon Jeans are made of 14 oz denim with 3% Zylon woven in. This makes KUSHITANI's Zylon Jeans two times stronger than regular jeans. It also has the coin pocket on the left side for the benefit of riders.
Zylon has excellent performance regarding creep, chemical resistance, cut/abrasion resistance, and high temperature abrasion resistance which far exceed all other fibers. It is 5X stronger than carbon fiber and 7X stronger than Kevlar.
If you ride on the street and are looking for something with strong protection (vs cotton) that you an wear all day and look casual while being comfortable, these are the jeans!