Bought this as a replacement for a polyester/nylon vest that lasted almost 3 years.  I KNOW this one will go longer.  My old one was so worn and, due to the shoddy fabric, was unable to be repaired. Plus, the zippers on my old one were plastic.  NOT that case with this one. This is CLOTH fabric, which is easy to repair if I ever need to.  The zippers on here are also metal, which I KNOW will last longer.  Plus, when it comes time to put it in the washer, I won't worry about losing it due to weak materials.