Underpads, both disposable and reusable, are great for your bed.If you use them, you won't have to wash your sheets as often. It also protects your mattress. With a disposalbe, you can simply throw it away after it's dirty. Reusables are more economically and ecollogically sound,in that in the long run you will not spend as much with reusables, and they don't fill up the landfills. Thus, if you want ultimate convenience and the long term cost is not an issue, we recommend disposables. If you want a product that is better economically and ecologically, we recommend reusables.