Your cot mattress is similar to an adult’s mattress in that it should last 8-10 years with proper care. This means that you’re covered for baby nuber 1 but if you have more children, you may need a new one when it starts showing signs of wear and tear. You can extend the lifespan of your mattress by cleaning it when needed. Amart’s Llama Cot Mattress is conveniently double-sided to improve longevity and make life that little bit easier!