Night Nappies: How to Stop Leaks and Help Your Baby Sleep Through
Waking up to a wet baby, a soaked sleepsuit, and sheets that need changing at 2am is nobody's idea of a good night. If you are reading this at an unreasonable hour with a crying bub and a pile of laundry staring at you — we have been there, and we can help. The fix is rarely more nappy changes. It is a better night nappy system. Here is why leaks happen, what actually stops them, and how to get everyone in the house sleeping through again.
Why is your baby’s nappy leaking at night?
Night-time leaks almost always come down to one of a handful of causes, and once you know which one applies to your situation, fixing it is straightforward.
Poor fit. Gaps around the legs or waist let moisture escape before the nappy even gets a chance to absorb it. Babies between sizes are especially prone to this — the nappy looks fine when you put it on, but once they roll over or curl up, those gaps open.
Not enough absorbency. A daytime nappy is designed for 2-4 hours. Overnight, you are asking it to handle 10-14 hours. Most standard nappies — disposable or cloth — simply cannot hold that volume. The nappy reaches capacity and the rest has nowhere to go but out.
Compression leaks. When your baby lies on a full nappy or shifts position, the weight of their body squeezes liquid out of the fabric. This is especially common with bamboo nappies, which hold a lot but release moisture under pressure. If your baby sleeps on their tummy or side, compression leaks are a likely culprit.
Build-up on cloth nappies. Detergent residue, barrier creams, or fabric softener can coat the fibres over time and reduce how well the nappy absorbs. What used to work fine suddenly stops holding.
Wrong nappy type for the job. Not all nappies are built for overnight. A pocket nappy with one insert is a great daytime option, but it will not get you through a full night of sleep.
The good news: every single one of these has a fix, and most of them do not require replacing your whole stash.
How do leaking nappies affect your baby’s sleep?
When your baby is wet, cold, and uncomfortable, they do not settle into deep sleep properly. Their sleep cycles get disrupted, and they wake more often — sometimes fully, sometimes just enough to fuss and doze off again without you realising why.
Moisture against the skin overnight also increases the risk of nappy rash, which makes the next night even harder. It becomes a cycle: leak, rash, discomfort, poor sleep, repeat.
Fix the nappy, and you often fix the sleep.
How can you prevent nappy leaks at night?
Here is a step-by-step approach that works, whether you are using cloth, disposables, or a mix of both.
1. Check the fit first. Before buying anything new, make sure the nappy you are using sits snugly around the legs and waist with no gaps. Run your finger around the leg elastic — it should feel firm but not tight. If your baby is between sizes, size up and use the snap-down rise to get a better seal.
2. Add a booster or insert. If the nappy fits well but still leaks, it is running out of capacity before morning. A hemp booster tucked inside your existing nappy adds serious absorbency without buying a whole new set. Hemp absorbs more moisture than cotton or bamboo and resists compression leaks — it is the quiet workhorse of the cloth nappy world. We have written more about why hemp fabric works so well for cloth nappies if you want the full picture.
3. Choose a dedicated night nappy. Day nappies and night nappies serve different purposes. A dedicated night nappy has multiple absorbent layers built in — often a combination of bamboo and organic cotton, plus moisture wicking stay dry layers which gives you enormous capacity with cotton’s quick surface absorption. This pairing is what gets you through 10-14 hours without leaks. If you are comparing fibre types, our breakdown of bamboo versus hemp fitted nappies walks through which situations each one suits best.
4. Pick the right cover. The waterproof layer matters. PUL covers are grab-and-go and need zero maintenance. Wool covers, once lanolised, are breathable, naturally antibacterial, and handle even the heaviest overnight wetters beautifully. Many families use both — PUL for day, wool for night. We compare the two in more detail in our PUL versus wool nappy covers guide.
5. Strip and refresh your cloth nappies. If absorbency has dropped over time, a deep clean on CLEAN nappies will remove built-up detergent, creams, and minerals. Follow up with a 60 degree hot wash and line dry, Regular maintenance keeps your nappies performing at their peak for years. A good wash routine should minimise this from happening at all.
6. Consider a waterproof mattress protector. It will not stop the leak itself, but it saves you stripping the bed at 3am while you work through the fixes above. Actually if you double two up you only need to remove 1 if the top layer gets soaked.
What is the best night nappy system?
Once you have ruled out fit issues and build-up, the most reliable overnight solution is a combination of high-absorbency fitted nappy and a quality cover.
Our Night Nappy paired with a lanolised wool cover handles up to 500ml of capacity — enough for the heaviest wetters and the longest sleep stretches. It is built with multiple layers of bamboo and organic cotton, designed specifically for 10-14 hours of protection.
If you already love your daytime nappy and just need more capacity, adding a hemp booster is the simplest upgrade. It slips into your existing cover and gives you the overnight absorbency without replacing your whole routine.
Frequently Asked Questions
Why does my baby’s nappy leak at night?
Night-time leaks are most commonly caused by poor fit, insufficient absorbency for a full night’s sleep, compression leaks when your baby rolls onto a full nappy, or build-up of detergents and creams that reduce the nappy’s ability to hold moisture. The fix usually starts with checking fit, then adding a booster or switching to a dedicated night nappy.
How can I stop reusable nappies leaking overnight?
Add a hemp booster inside your existing nappy for extra capacity. If that is not enough, switch to a dedicated night nappy with multiple absorbent layers, and pair it with a well-fitting waterproof or wool cover.
What is the best night nappy for heavy wetters?
A fitted nappy made with bamboo and organic cotton, paired with a lanolised wool cover, is the most reliable system for heavy wetters.
Hemp holds more moisture than any other natural fibre so adding this as an extra booster is a good choice. The wool cover provides a breathable, leak-resistant outer layer that handles overnight volume.
How long can a night nappy last?
A properly fitted night nappy with sufficient absorbency should last 10-14 hours. This covers a full night’s sleep, even for babies who sleep through, without needing a middle-of-the-night change.
Can I use the same nappy for day and night?
Daytime nappies are generally designed for 2-4 hours of wear. Overnight, your baby needs more absorbency to handle the longer stretch. You can often use your daytime nappy with a booster added for extra capacity, or invest in a dedicated night nappy that is purpose-built for the longer duration.
-
SLEEP SAVERSaleLimited
Wool Lovers Bundle Original price was: $186.00.$130.20Current price is: $130.20.Select optionsOur Wool Lovers Bundle – featuring 3 x Merino Wool Nappy Covers and Lanolin Wool Care Treatment. Perfect for day or night, these ultra-breathable, leak-proof wool covers keep your baby dry, comfy, and rash-free the natural way.
Made from 100% certified, mulesing free Merino wool, our covers are soft, durable, and naturally antibacterial – ideal for overnight nappies or heavy wetters. The included lanolin treatment keeps your covers conditioned, waterproof, and performing at their best. A must-have for every eco-conscious parent, this bundle makes cloth nappying easier, more sustainable, and oh-so-snuggly.
Reusable. Natural. Australian. Designed for better sleep and a happier planet.
Small (2-5kg – PREORDER) Med (4-8kg) Large (8-16g) & XL (14kg+) OR want a Mix of Sizes – Choose Mixed and add your size selection in comments at checkout. -
SaleLimited Leaking Nappies Kit Original price was: $58.00.$40.60Current price is: $40.60.Select options
Got leaking disposable nappies or reusable nappies that just don’t hold enough at night? Tired of changing baby, changing bedding at 2am thanks to leaking nappies? … We hear you babe, but don’t worry this quick fix kit is the solution you have been dreaming off!
Easy? Yes! Cheap? Yes! Actually works? Yes!
Layer up as follows: Disposable (or normal nappy) on first, then folded bamboo fold up between the legs (to absorb excess wee), then pop waterproof nappy cover over the top. Make sure everything is tucked inside the cover to avoid wicking and sleepy time here we come baby!
NB 2.5-5kg | Small 3-5kg | Medium 5-8kg | Large 8-14kg | XL 14kg+
-
SaleLimited
Night Nappy Starter Pack Price range: $203.20 through $231.20Select optionsThe perfect balance of dry nights, no stress & manageable washing routine to kick start using cloth nappies at night. Includes 4 Award Winning Night Nappies & 2 Wool Covers in our new ultra lush, woolmark certified wool interlock. Thicker wool covers for better coverage!
Don’t forget to add your Lanolin so you can waterproof your wool covers. We only sell the best lanolin an it has so many uses
Small 2-4kg PREORDER Arrives Sept 25
Medium 4-7kg | Large 8-13kg | XL 14kg -
BEST SELLER
Night Time Nappy $39.00Select optionsTired of 2am leaks? Our award-winning Night Time Nappy keeps heavy wetters dry for up to 14 hours, with layers of super-absorbent bamboo/organic cotton and a stay-dry layers that locks moisture in. Pair it with our night nappy boosters and lanolin soaked wool covers to build the ultimate leak-free overnight setup — so everyone gets a full night’s sleep.
Loved because > absorbent front, back & hips > sized for the perfect fit > buttery soft fabrics > up to 23 layers of absorbency
In stock
Still got questions?
No problems just shoot our friendly team a message and we are here to help. Or you can find more info on our BLOG
