120,000+ FULLY TRAINED TODDLERS

FROM DIAPERS TO DRY

IN 15 DAYS

Complete your potty training with Loondie - 

No stress, mess, or guilt.

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POTTY TRAINING GEAR by Loondie

Everything you need to ditch diapers for good

Potty Training Undies

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

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Overnight Equipment

Bedtime tools that support dry nights without slipping back into diapers or pull-ups.

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Bathroom Upgrades

Kid-sized potty seats and stools that make it easier for your toddler to become independent

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Potty Accessories

Whether at home or on the go, these simple tools will make your life 10x easier.

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You’re not alone – and you’re not doing it wrong.

Potty training isn’t easy, and every child is different. That’s why Loondie was built – to meet your toddler’s exact learning phase with the tools that actually work.

tRY RISK-FREE

120,000+ Toddlers Successfully Trained

Expert-Backed 
Methods

Loved by Parents Worldwide

90-Day Progress Guarantee

120,000+ Toddlers Successfully Trained

Expert-Backed 
Methods

Loved by Parents Worldwide

90-Day Progress Guarantee

THE LOONDIE METHOD

Potty Train in 3 Easy Phases

A clear pathway from diapers to dry. No stress, no guesswork.  

Phase 1: Awareness

Goal: Help your toddler recognize when they need to go.

Use: ✔ Potty Training Undies

Goal: Allow your toddler to feel wet without making a mess.

Phase 2: Consistency

Goal: Create independent potty habits during the day.

Use: ✔ Bathroom Upgrades

Goal: Make your bathroom accessible and exciting for your toddler.

Phase 3: Overnight Confidence

Goal: Stay dry during naps and bedtime

Use: ✔ Overnight Equipment

Goal: Let your child sleep in ‘big kid’ undies while our equipment keeps the bed mess-free.

Hear from

Parents Who’ve Been in Your Shoes

90-Day Progress Guarantee

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

tRY RISK-FREE

Loondie Potty Undies™

Everything you need to ditch diapers for good

Loondie Potty Undies™

Reusable

Builds awareness

Feels like underwear

100% Cotton

Eco-friendly

Reusable

Single-use

Delays potty signals

Feels like a diaper

Can cause rashes

Ends up in a landfill

Loondie Potty Undies™

Reusable

Builds awareness

Feels like underwear

100% 

Cotton

Eco-friendly

Reusable

Single-use

Delays potty signals

Feels like a diaper

Can cause rashes

Ends up in a landfill

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90-day money-back guarantee included

Frequently Asked 
Questions

Still have questions?

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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.

Still have questions?

Thousands of parents have already made the switch. 
You’ve got this – Loondie will help.

Try risk free

From diapers to dry – with love, not stress.

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