A small washable pad is for one spot on a bed or a chair, not for wrapping a whole mattress and not for wearing. PRIVA Waterproof Washable Incontinence Bed Pads come as a 1-pack, 17 by 22 inches, listed at $9.65 when this article was written. The notes call it a washable waterproof underpad for senior bed-wetting, and they point out that 17 by 22 is a small pad rather than a full mattress cover. The title also says reusable, heavy duty, and ultra absorbent, and it names elderly seniors, kids, and pets. The listing details are the ones current when the article was written. Check the Amazon page before you buy. This is shopping help for adults, not medical advice, and we did not wash a sample or rate it.
Seventeen by twenty-two covers a zone of the bed, not a whole mattress. On a bed it covers hips or a seat-shaped zone, depending on where you place it. On a recliner it can cover the cushion a person actually sits on. It will not cover a queen mattress edge to edge. If you needed a full mattress cover, this listing is the wrong shape.

Waterproof cloth, one pack, and a small rectangle
Waterproof, in the title, is the reason to put the pad between a person and the furniture. The notes say washable and waterproof. Fluid is supposed to stay in the pad instead of soaking a mattress or a chair. We do not have a lab measure for how much it holds. Heavy duty and ultra absorbent are title words. Read them as the seller’s description, then judge the pad after real use at home.
The pack count is one. At $9.65, that price is the price of the single pad, not a case rate. There is no per-piece discount to calculate. One pad means you need a plan for laundry. While it is in the washer, the bed or the chair is uncovered unless you own a second. Confirm the live price and the 1-pack wording before you order two by accident, or before you assume a multipack is hiding in the size menu.

The title mentions kids and pets alongside elderly seniors. This review stays with adult beds and chairs. The size is 17 by 22 either way.
The listing is here: the 17 by 22 inch washable underpad on Amazon.
On the bed or the chair, then into the wash
Place the pad where the wetness actually happens. For sleep, that is often under the hips. For a nap in a chair, it is the seat. Smooth it flat. A bunched corner lets fluid run off onto the sheet or the cushion, which defeats the waterproof layer. You can see a pad this small. Do not bury it under so many blankets that you forget it is there at change time.
Leave it on the furniture. It does not go on the body, and it will not do the job of a brief or a pull-on for a walk to the kitchen. Many households use a body product and this pad together: one for the walk, one for the mattress. The pad’s job starts when someone sits or lies down.
Washable and reusable are the cost story. You are not throwing the pad out each morning. The notes we used do not list a wash temperature, a dryer setting, or a cycle count, so follow the care label on the pad that arrives rather than a guess. Air it fully dry before it goes back on the bed. A damp pad on a mattress is a poor kind of waterproof.
Check the skin when you change the bed. A washable pad can be very useful and still leave skin wet if it sits too long. Clean and dry the skin. If you see a rash, call a clinician. The pad is furniture protection, not a skin treatment.
A comparison of bed-pad sizes is on the site at the bed-pad size comparison. That page is where other formats are set side by side. This review stays with the 17 by 22 inch washable pad. Look at the Amazon page again before you buy. Size, the 1-pack, washable wording, and the $9.65 price were current when the article was written.