Complete Night Nappy Guide

The Complete Guide to Fitting Night Nappies

Get the perfect fit for leak-free nights. Even the most absorbent nappy will leak if it doesn't fit right!

Why Fit Matters So Much

"Think of your night nappy like a rain jacket. The best, most expensive rain jacket in the world won't keep you dry if it has gaps at the neck or wrists!"
No gaps where wetness can escape
Snug but comfortable elastic around legs and waist
All absorbent material tucked inside
Even coverage all around baby's bottom
Room for baby to move and sleep comfortably

Mighty Minky Night Nappy

All-in-one pocket nappy for average wetters

Size Range: 3.5kg to 19kg (about 8 to 42 pounds)
Waist snaps • Rise snaps • Leg elastic All-in-one design with built-in waterproof layer

Step-by-Step Fitting Guide

Before you even put it on baby, make sure:

  • Your insert is folded and ready
  • The insert is fully tucked into the pocket
  • Any boosters are layered inside
  • The nappy is unsnapped and laid flat
Important
Make sure no fabric is sticking out of the pocket opening! Even a tiny bit of insert poking out will wick wetness right out of the nappy.

Lay baby on their back on a safe changing surface.

Pro Tip
Have everything ready before you lay baby down. Night nappies are bulkier than day nappies, so they take a bit longer to put on. Having toys or a book handy helps keep baby still!

Slide the nappy under baby's bottom. The back should come up to baby's waist.

✓ Correct Position
  • Top sits just below belly button
  • Back covers most of bottom
  • Comes up to waist in back
✗ Common Mistakes
  • Too low = back leaks
  • Too high = uncomfortable
For Boys
Make sure everything is pointed DOWN before you close the nappy!

The Mighty Minky has snap-down rise settings to adjust the length as baby grows.

Interactive Size Guide
3.5kg - 6kg
Smallest Setting

Snap down all three rows. This shortens the nappy for tiny bottoms.

Rise rows to snap:
1
2
3
6kg - 12kg
Medium Setting

Snap down two rows. Leave the top row unsnapped.

Rise rows to snap:
1
2
3
12kg+
Largest Setting

Snap down one row OR leave all unsnapped. This gives maximum length.

Rise rows to snap:
1
2
3

How to tell if rise is right:

  • Should not have excess fabric bunching up
  • Should cover baby's bottom completely
  • Legs should move freely
  • Should not be pulling tight in the crotch

Pull the front of the nappy up between baby's legs and center it on their tummy.

Getting it centered:
  • Equal amounts of fabric on each side
  • Center seam runs straight up the middle
  • Wings are even on both sides
Elastic sits in the leg crease
Check the leg holes
Elastic should sit in the crease where baby's leg meets their body. Not on the thigh, not on the hip - right in the crease! This is where the seal happens.

Time to snap! The Mighty Minky has multiple snap settings for a custom fit.

Hip snaps first:
  1. Hold nappy centered on tummy
  2. Pull one wing across (don't pull super tight!)
  3. Choose a snug but not tight snap
  4. Repeat on the other side
Which snap to use?
  • Inner snaps = tighter fit
  • Outer snaps = looser fit
  • Different settings on each side is OK!
Two Finger Gap ✓
Two-Finger Test Guide
Too Loose Perfect Too Tight
Perfect! ✓
Two fingers fit comfortably - that's the sweet spot!
MOST IMPORTANT for preventing leaks!
Run your finger around each leg opening.
✓ Good Fit
  • Elastic snug in leg crease
  • No gaps
  • One finger fits under elastic
  • No bunched fabric
✗ Problems
  • Cutting into thigh = too tight
  • Gaps = leaks waiting to happen
  • Twisted elastic = start over

Before you put baby's PJs on, do these quick checks:

Final Fit Checklist
0% Complete
Two-finger test at waist passed
Both legs have elastic in crease, no gaps
Back comes up high enough
No bunching - fabric is smooth
Tug test - nappy stays in place
No insert fabric poking out
Baby can move legs freely

Night nappies are bulkier than day nappies, so you might need:

Bigger PJs (size up!)
Sleep sacks
Stretchy pants
Looser clothing
Pro Tip
If PJs are too tight, they can compress the nappy and cause leaks! The absorbency needs room to work.

Troubleshooting

Check
  • Is elastic in leg crease or on thigh?
  • Are there gaps when baby moves?
  • Is rise too long (bunching in crotch)?
  • Are inserts poking out?
Fix
  • Adjust to smaller rise setting
  • Try different waist snaps for snugger fit
  • Tuck elastic into crease
  • Double-check pocket is fully closed
Check
  • Does nappy come up high enough in back?
  • Is it sliding down during night?
  • Is baby a back sleeper?
Fix
  • Use longer rise setting
  • Tighten waist snaps
  • Add more absorbency toward back
  • Make sure waist elastic is snug at back
Check
  • Do marks fade in 20 minutes? (normal)
  • Are marks deep and lasting? (too tight)
Fix
  • Loosen waist snaps by one setting
  • Check if rise is too short
  • Make sure elastic isn't twisted
  • Try next rise setting up
Check
  • Are waist snaps tight enough?
  • Is rise setting correct?
  • Using enough absorbency?
Fix
  • Tighten waist snaps
  • Try shorter rise setting
  • Heavy nappy = better fit
  • Check snaps are on right setting

Heavy Wetter Fitted Night Nappy

Two-part system for maximum absorbency

Size Range: 5kg to 18kg (about 11 to 40 pounds)

Understanding the Two-Part System

1. Fitted
Absorbent
→
2. Add Cover
Waterproof
→
Ready!
The Fitted Nappy
  • Made from absorbent bamboo and cotton
  • Has NO waterproof layer
  • Can absorb TONS of liquid
  • Needs a cover to keep clothes dry
The Cover
  • Goes OVER the fitted nappy
  • Provides waterproof protection
  • Can be TPU/PUL or wool
  • Must completely cover all fitted fabric

Step-by-Step Fitting Guide

Before putting it on baby:

  • Have your snake inserts folded and ready
  • Add any extra boosters you're using
  • Layer everything inside the fitted nappy
  • Have your waterproof cover ready nearby
  • For wool covers, make sure it's freshly lanolised!
Unlike pocket nappies, fitted nappies have the absorbency laying on top, not stuffed in a pocket. Make sure all inserts are positioned where baby needs them most!

Lay baby on their back and slide the fitted nappy under baby's bottom.

Positioning:
  • Back should come up to their waist
  • Front should come up to just below belly button
  • All absorbent layers should be centered
  • Make sure inserts stay in position

The Heavy Wetter Fitted has crossover waist snaps AND separate leg adjustments!

Waist Snaps
  1. Pull front up between baby's legs
  2. Pull wing across baby's tummy
  3. Find snug but comfortable snap
  4. Repeat with other side
Leg Snaps
  1. Find snaps on each side
  2. Choose setting for snug elastic in crease
  3. Each leg can be different!
  4. Perfect for chunky or skinny thighs

Before adding the cover, check the fitted:

Fitted Nappy Check
0% Complete
Leg elastic in the crease - no gaps
Waist is snug (two fingers fit)
All fabric tucked in - no insert hanging out
Smooth fit - not bunched or twisted
Complete coverage of bum and front
Baby can move legs freely
Remember
The fitted nappy is NOT waterproof yet! You'll add the waterproof cover next.

Adding a Cover

Cover Comparison

Feature TPU/PUL Cover Wool Cover
Waterproofing Built-in, always Needs lanolin
Ease of Use ⭐⭐⭐⭐⭐ ⭐⭐⭐
Fit Must be snug Can be looser
Breathability ⭐⭐⭐ ⭐⭐⭐⭐⭐
Bulk Less bulky Can be bulkier
Washing Normal wash Hand wash / wool cycle
Maintenance Just wash Lanolise every 3-4 weeks
Night Use Great ⭐⭐⭐⭐ AMAZING ⭐⭐⭐⭐⭐

TPU and PUL are both types of waterproof fabric. Easy to use and quick to put on.

Step 1: Choose the Right Size

Your cover must be big enough to completely cover the fitted nappy! If any fitted fabric sticks out, you'll get leaks.

Rule: When in doubt, size up on the cover.

Step 2: Put On the Cover
  1. Slide cover under baby (fitted is already on)
  2. Pull cover up over the fitted nappy
  3. Make sure ALL fitted fabric is tucked inside
  4. Snap or velcro closed
Step 3: The Tuck Test

This is the most important step! Do this EVERY time:

  • Run finger all around each leg opening
  • Tuck any fitted fabric back inside
  • Make sure only cover fabric is showing
  • Check waist front and back
Critical
Even a tiny bit of exposed fitted fabric will cause leaks. Tuck, tuck, tuck!

Wool covers are magical for nighttime! They're breathable, naturally antibacterial, and super gentle.

⚠️ Important: Wool Must Be Lanolised!

Wool is only waterproof when it's been treated with lanolin. Re-lanolise every 3-4 weeks. If wool leaks, it probably needs more lanolin!

Putting On Wool
  1. Slide wool cover under baby
  2. Gently stretch it over the fitted
  3. Pull up over the entire fitted
  4. Smooth it out - no snaps needed!
Wool Fit Tips
  • Wool can be looser - it doesn't need to be tight
  • Ribbed edges gently hug
  • ALL fitted fabric must still be covered!
  • Baby should move freely
Wool Bonus
Wool breathes better than TPU, so baby often stays cooler and gets fewer rashes!

Size Guide

Interactive Size Guide
5kg - 8kg
Small Setting

Use tightest snap settings. Covers might seem big - that's okay! Less absorbency needed = easier fit.

8kg - 13kg
Medium Setting

Sweet spot for fit. Usually middle snap settings. Covers fit nicely. Can use maximum absorbency without too much bulk.

13kg - 18kg
Large Setting

Use outermost snap settings. Less overlap at waist. Need bigger covers. Might need the most absorbency.

Troubleshooting

Check
  • Is fitted fabric sticking out anywhere?
  • Is cover big enough?
  • If using wool, is it lanolised?
  • Are there gaps at legs or waist?
Fix
  • Size up in covers
  • Tuck ALL fitted fabric inside
  • Re-lanolise wool covers
  • Make sure cover comes up high enough
Check
  • Is cover the right size?
  • Is fitted pulled up properly?
Fix
  • Size up in covers
  • Try different cover brand that runs bigger
  • Remove one layer of absorbency
  • Make sure fitted isn't bunched low
Check
  • Has wool been lanolised recently?
  • Does it feel dry or waxy?
  • Any thin spots or holes?
Fix
  • Re-lanolise (fixes 90% of wool leaks!)
  • Use enough lanolin in water
  • Let wool dry completely between uses
  • Check for wear and tear

Tips for Fitting Success

1 Practice during the day first - try them during daytime naps!
2 Size up PJs - baby might need 1-2 sizes bigger than normal
3 Check fit as baby grows - review every few weeks
4 Take photos when you get a good fit to remember how it looks
5 Give it time - by night 5, you'll be a pro!
6 Ask for help - post fit check photos in our Facebook community

Ready to Get Started?

Get the perfect night nappy for your little one

Shop Mighty Minky Shop Heavy Wetter
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