The Life of your harness is a maximum of two years. Please make sure to mark the date purchased on the harness tags provided. Replace harnesses after two years of use. Harness webbing can degrade much more rapidly when exposed to sunlight for prolonged periods. In such conditions, inspect your harnesses more frequently, and consider replacing them sooner than two years.
Seriously – need to replace these every two years? Perhaps this explains the low price.
What are the stock stranglers made of? Are there aftermarket harnesses made of better material? The search goes on.