Experts generally recommend that men replace their underwear every to maintain optimal hygiene, comfort, and support. While there is no "hard and fast" expiration date, the buildup of microscopic bacteria and the gradual degradation of fabric and elastic make annual refreshes a standard health practice. When to Retire Your Current Pairs
Regardless of age, you should immediately replace any pair showing these "red flag" signs: How Often Should a Man Be Purchasing New Underwear? how often should men buy new underwear