Potty Training Undies

Soft, washable underwear that lets toddlers feel wetness, so they learn faster without the mess.

Potty Training Undies - Buy 3, Get 7 Pairs For FREE

4.91/5.0 (7,500+ reviews)

Bears pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Giraffes pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Lions pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Puppies pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Rainbow pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Watermelon pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Whales pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Penguins pattern

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Pink originals

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Yellow originals

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Turquoise originals

Potty Training Undies

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4.91/5.0 (7,500+ reviews)

Green originals

Potty Training Undies

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4.93/5,0 (6,000+ reviews)

Seaworld pattern

Protect+ Undies

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4.93/5,0 (6,000+ reviews)

Bear pattern

Protect+ Undies

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4.93/5,0 (6,000+ reviews)

Jeans pattern

Protect+ Undies

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4.93/5,0 (6,000+ reviews)

Giraffe pattern

Protect+ Undies

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4.93/5,0 (6,000+ reviews)

Melons pattern

Protect+ Undies

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Frequently asked questions

What age is best to start with Loondie Potty Undies™?

We recommend starting when your toddler shows signs of readiness—like staying dry for short periods, showing interest in the potty, or hiding to poop. That usually happens anywhere from 18 months to 3.5 years.

Do these work for night-time?

Our undies are best for daytime training. For naps and overnight, we recommend using our Nighttime Equipment for extra protection without going back to diapers.

How many pairs do I need?

Most families start with 5–10 pairs. That way, you won’t run out during the first few accident-heavy days.

What if my child refuses to wear them?

That’s okay—and normal! But these look and feel like real underwear, so most kids are excited to try them. Start with low-pressure encouragement and let your child lead the pace.

Are they machine washable?

Yes! Just toss them in with your regular laundry. Cold wash, tumble dry low. No fabric softener needed.

What if they don’t work for us?

We offer a 90-day Progress Guarantee. If you’re not seeing results or your child isn’t ready yet, we’ll help you swap sizes, exchange, or refund—no hassle.

Do I need to stop using diapers completely?

Not necessarily. Some parents go cold turkey, others switch gradually. Our system supports both—do what’s best for your child and your sanity.

How do I know what size to get?

Use our easy size guide. If your child is between sizes, we recommend sizing up for comfort.

From diapers to dry – with love, not stress.

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