Yes, life jackets do have a lifespan, and while they don't have an official expiration date like food or medication, they can degrade over time. Factors like UV exposure, wear and tear, and improper storage can compromise their buoyancy and overall effectiveness, so it's crucial to inspect them regularly for any signs of damage or deterioration. Typically, manufacturers recommend replacing life jackets every 5 to 10 years, depending on the material and usage. If you notice any rips, tears, or fading, or if the jacket has been submerged in water for an extended period, it's time to retire it and invest in a new one to ensure your safety on the water.