How long will the mattress pad last? January 15, 2021 14:47 Updated With normal use and regular washing the mattress pad can provide durable protection for five years or longer. Related articles What is the warranty for Birch Mattresses? Is the mattress pad waterproof? Can I wash my Plush Organic Mattress Topper? What is the difference between the mattress pad and mattress protector? What are the dimensions of the mattress pad?