4.9/5.0 (6,000+ Proud Parents)

Loondie Protect+ Undies™

Name: Loondie Protect+ Undies™
Brand: My Store
SKU: NSS17221-LD054
Price: 24.97 USD
Availability: InStock

Works like diapers – Feels like underwear

All versions of the Loondie Protect+ Undies.

Woman's hands stretching the Loondie Protect+ Undies showing their durability.

Buttons for size adjustment on the Loondie Protect+ Undies.

Animal print on the fully stretched Protect+ Undies for potty training.

Close up on the stretchable materials used on the Loondie Protect+ Undies.

Woman holding the denim print Loondie Protect+ Undies for potty training.

Woman holding Protect Plus Undies with an absorbent insert added into it.

Loondie Protect Plus Undies with the Loondie DryLayer Inserts added.

"We use these for car rides and overnight and they’ve saved us from so many messes without feeling like we’re back in diapers."

Lilly S. ✔ VERIFIED CUSTOMER

"I was skeptical, but 3 days in and my toddler started telling me when he had to go. It's soft, snug, and surprisingly effective."

Sarah F. ✔ VERIFIED CUSTOMER

"My toddler doesn’t fight wearing them, which is a win in itself. They feel soft and not plasticky like pull‑ups."

Ana W. ✔ VERIFIED CUSTOMER

"We only use them when leaving the house or at night. I love that we can stay consistent with training everywhere."

Maria T. ✔ VERIFIED CUSTOMER

4.9/5.0 (6,000+ Proud Parents)

Loondie Protect+ Undies™

Works like diapers – Feels like underwear

Just-in-case backup that keeps potty training on track – without ever going back to pull-ups or diapers. Built for naps, overnights, and outings when you still want to train, not revert.

Title

Holds up to 325ml with DryLayer™ Inserts

Fits toddlers up to 35 lbs (15 kg)

Elastic & adjustable size

Reusable, washable, eco-friendly

CPC & CE certified for quality

Size chart

Title

Choose

Seaworld

Bear

Jeans

Giraffe

Melons

Fast shipping to United States

1-Year 
Warranty

Free Shipping Over $50

Easy
Returns

Secure
Checkout

90-Day Progress Guarantee

If you don’t feel you’ve made progress in 90 days, we’ll happily refund you.

Frequently Asked
Questions

Is the size adjustable?

The snap buttons on the front and sides let you customize the waist and leg openings as your toddler grows. They’re designed to fit most toddlers up to 35 lbs (15 kg), so one pair grows with your child through the whole training journey.

Are these just for night-time?

Not at all. They’re great for overnights, naps, long car rides, or any time you need more security than our regular Potty Undies™. They’re the “just-in-case” option that keeps training consistent without going back to diapers.

How much can they hold?

On their own, they handle small to moderate accidents. With the optional inserts, they hold up to 325 ml – enough for overnight protection or longer trips.

Do they feel like diapers?

Nope. They’re soft, pull-on undies that feel like real underwear. The difference is the discreet waterproof layer and extra absorbency for peace of mind.

How many should I buy?

Most families grab five pairs to rotate through naps and nights, plus a couple of inserts. If you’re using them daily for both sleep and outings, 10 pairs is ideal.

Are they machine washable?

Yes! Cold wash, tumble dry low. Skip fabric softeners – they reduce absorbency. Inserts can be washed right along with them.

Do they replace diapers completely?

That’s the goal. Protect+ Undies are made to avoid going back to pull-ups or diapers while still giving you backup. They bridge the gap between training and full independence.

Can they handle poop accidents?

Yes. Shake solids into the toilet and rinse before washing. The waterproof layer keeps messes contained.

What makes them different from regular Loondie Potty Undies™?

Potty Undies™ are lightweight for building awareness during daytime at home. Protect+ Undies™ are the next step – more absorbency, waterproof backing, and a secure fit for situations where you can’t risk a leak.

How do they actually work?

Most training pants are either too absorbent (like diapers) or too thin to protect during accidents. Loondie Protect+ Undies™ are different – they give toddlers a just-in-case safety net while still teaching body signals.

Each pair is made with: