The lifespan of a sleeping pad is directly connected to the amount you use it. A sleeping pad that is slept on every night will start to see wear and tear a lot faster than a sleeping pad that is only used a few times per year.
A mattresses' biggest enemies are dirt, body oils, bug spray, and sunscreen. These substances can all contribute to the breakdown of the laminates that bond the external fabrics of your mattress to its internal components. Using a sheet on the mattress and cleaning it regularly (both the sheet and the mat) will help you get the most out of your mattress. A mattress that is used daily and seldom cleaned may only last a few months, while a well taken care of mattress, used occasionally under normal conditions, can last for many years.