Aolso Potty Training Mattress Protector (Dinosaur) – Waterproof washable underlay, 70 x 90 cm for cot beds

If you’re in the middle of night-time potty training, small accidents have a habit of turning into big worries. The Aolso Potty Training Mattress Protector is a waterproof washable bed underlay designed to sit under a child’s bedding, helping to protect the mattress while keeping things more comfortable for your little one.

It’s not trying to be a “forever” mattress replacement. Rather, it’s a practical layer for the messy in-between stage. With a 70 x 90 cm size, a cotton surface, and the promise of strong leak-proof protection, it’s aimed at parents who want less stress when the bed gets tested.

What this is for

This product is a potty training mattress protector/underlay that you can use during night-time training and everyday sleep situations like naps, sleepovers and play sleep. The idea is simple: when your child has an accident, you have a dedicated washable layer to deal with it—so you’re not left cleaning (or worrying about) the whole mattress.

The surface is described as 100% cotton and “naturally breathable”, which is a nice angle for night-time use. On paper, breathable cotton can help with airflow and comfort, rather than trapping heat or feeling clammy. That matters when you’re dealing with long nights and sensitive skin.

The everyday benefits (and where it helps)

Aolso’s key claims are around waterproof protection and water absorption. The training mattress is described as having good water absorption and being leak-proof, storing moisture so the bed stays “dry and comfortable”. In practical terms, you’re buying time and protection: less chance of water soaking down into the mattress, and less chaos after an accident.

A helpful detail is the stated size: 70cm x 90cm. That makes it more specifically targeted to cot-style and children’s bed setups rather than generic adult mattress covers.

You also get a fairly parent-friendly cleaning approach. The mattress-wetting pad can be removed and put into the washing machine, which should make repeat use much more realistic during training weeks.

What stands out about the materials

The protector includes an extra-thick mattress with cotton wrapping (described as pure cotton) and a breathable surface. Again, this is “on paper” comfort—there’s no guarantee it will feel identical to every other cotton bedding option—but the direction is sensible for children’s sleep: comfort first, then protection.

It’s also positioned for longer-term use “for a long time”, suggesting the thicker build is meant to hold up better than very thin disposable-style layers.

One limitation to keep in mind: during heavy or frequent accidents, any protector can become part of your weekly routine. The waterproofing and absorption are there to reduce damage, but you’ll still want to follow washing guidance and stay on top of cleanliness.

Fit and compatibility you can sanity-check

The stated size is 70cm x 90cm, and the description says it fits all children’s beds including twin beds and cribs (and cribs again). It’s meant for single beds and children’s cot setups within that size range.

Before buying, it’s worth checking: - whether your child’s mattress is exactly around the 70 x 90 cm footprint - how the protector is intended to sit on the bed (the listing describes it as a portable underlay/pad, but it’s smart to confirm you can lay it flat in your setup)

It may not suit you if your bed size doesn’t match this 70 x 90 cm measurement, because padding meant for training beds is rarely “universal” in the way a full-size adult cover can be.

Care and cleaning: the part that matters most

The cleaning process is one of the more convincing reasons to choose a product like this. Instead of dealing with a wet mattress at night, you remove the portable mattress/protector layer and wash it.

If your main goal is fewer late-night hassles, this approach fits the job. Still, keep expectations realistic: machine washing can’t fully replace good hygiene habits, so you’ll want to dry properly and have a plan for repeat cycles during training.

Final verdict

Is it worth it?

Aolso’s Potty Training Mattress Protector is worth considering if you’re actively potty training at night and want a waterproof, cotton-topped underlay that’s designed to absorb leaks while protecting the mattress. The removable, washable setup is the main practical advantage, and the 70 x 90 cm size makes it targeted for children’s beds and cot-style mattresses.

It might not be the best choice if your bed/mattress footprint isn’t 70 x 90 cm, or if you’re expecting it to work like a replacement mattress. It’s a protection layer, not a miracle cure for accidents.

Who it suits (and who should skip it)

• It suits families who want a dedicated training mattress protector for naps, night sleep and sleepovers.
• It may not suit you if you don’t plan to wash bedding regularly during training, or if you need a different size/fit.

Quick FAQ

Is it suitable for night-time potty training?

Yes—night-time potty training is specifically mentioned, alongside use during naps and other sleep situations.

Is it waterproof?

The description states it is waterproof and leak-proof, with water absorption intended to store moisture and help avoid wetting the mattress.

Can it be machine washed?

The listing says you can remove the pad and put it in the washing machine.

What size is it?

It measures 70cm x 90cm.

Does it work only for a specific bed type?

It’s described for children’s beds such as twin beds and cribs, but the key factor is the 70 x 90 cm size match.