Disposable underpads—often called bed pads or chux—are designed to protect beds, chairs, recliners, wheelchairs, and other surfaces from urine leakage. They are single-use, easy to replace, and especially useful when laundry is inconvenient or a caregiver needs fast cleanup.
This guide focuses specifically on disposable underpads for incontinence: how to choose the right size and absorbency, when disposables make more sense than washable pads, and the mistakes that cause leaks or wasted money.
What is a disposable underpad?
A disposable underpad has an absorbent top layer and a waterproof or moisture-resistant backing. It goes under the person, not inside underwear or an adult brief.
Browse AllCareStore's underpads collection to compare disposable and reusable options.
When disposable underpads work best
- Travel: Use and discard without carrying wet laundry.
- Caregiver-assisted changes: A fresh pad can be placed quickly during a bed or brief change.
- Temporary recovery: Useful when protection needs are short-term.
- Facility or respite care: Single-use products simplify cleanup and supply routines.
- Backup protection: Helpful on top of a fitted sheet beneath a correctly fitted brief or pull-up.
Choose size based on the surface you need to protect
A chair or wheelchair needs less coverage than a bed. For beds, choose a pad large enough to cover the hips and the area where the person moves during sleep. For chairs, avoid a pad so large that it bunches or hangs awkwardly over the seat.
For a more detailed approach, use our underpad sizing and absorbency guide.
Choose absorbency based on the actual leakage pattern
Terms such as light, moderate, heavy, and maximum are not standardized across every manufacturer. Compare the specific product description rather than assuming one brand's “heavy” performs exactly like another's.
If a pad is consistently saturated, move to a higher-absorbency product or a larger coverage area. If the pad is mostly dry but the mattress still gets wet, the problem may be placement or shifting rather than absorbency.
Disposable vs reusable underpads
Disposable pads are convenient and require no laundry. Reusable underpads can be more economical for long-term daily use when regular washing is practical.
Many households use both: washable pads as the routine home option and disposables for travel, backup, illness, or laundry gaps.
How to position a disposable underpad on a bed
- Place a waterproof mattress protector under the fitted sheet when possible.
- Put the disposable underpad on top of the fitted sheet.
- Center it under the hips and buttocks.
- Keep the pad flat, without wrinkles or folded edges.
- Replace it when wet, soiled, damaged, or no longer positioned correctly.
If sliding is a recurring problem, see our guide on how to keep bed pads from sliding.
Underpads are backup—not a substitute for the right wearable product
For someone using adult diapers or protective underwear, the underpad should usually be secondary protection. If the wearable product leaks repeatedly, review fit, absorbency, and product style instead of relying on the bed pad to catch every leak.
Our adult diaper leak troubleshooting guide can help identify common causes.
Frequently asked questions
Are disposable underpads the same as bed pads?
They are often used interchangeably. “Underpad” is the broader product term, while “bed pad” commonly refers to an underpad used on a bed.
Can disposable underpads be used on chairs?
Yes. Choose a size that fits the seat without excessive bunching and make sure the backing does not create a slipping hazard.
Can disposable underpads be washed?
They are designed for single use. If you want a washable option, choose a reusable underpad made for laundering.
Should I put the underpad under or over the fitted sheet?
For easy changing, the absorbent underpad usually goes on top of the fitted sheet. A waterproof mattress protector can sit beneath the fitted sheet as backup.
Shop disposable and reusable bed protection: Explore AllCareStore underpads and mattress covers and bedding protection.
