A wet bag is a reusable water-resistant or waterproof-lined bag used to separate damp, dirty or soiled items from clean belongings. Families commonly use wet bags for daycare, childcare, swimming lessons, toilet training, cloth nappies, messy play and travel.
A wet bag folds flat when empty and can be washed and reused, making it a practical alternative to carrying disposable plastic bags for routine family messes.
What is a wet bag used for?
A wet bag creates a separate place for items you do not want loose inside a backpack, swimming bag, pram or suitcase.
- Daycare and childcare: food-covered, painted, muddy or soiled clothing.
- Swimming: damp swimmers, reusable swim nappies and small towels.
- Toilet training: wet underwear, training pants, shorts and socks after an accident.
- Cloth nappies: used nappies and reusable wipes while away from home.
- Messy play: paint, water-play or mud-covered clothes.
- Travel: toiletries, damp washcloths or small laundry items.
Wet bags for daycare and childcare
A wet bag is particularly useful at childcare because clean clothing may need to be replaced after food spills, water play, paint or toilet-training accidents. Educators can place wet or soiled clothes inside for the trip home.
For a complete packing list, use our Australian daycare and childcare essentials checklist.
Wet bags for swimming lessons
After swimming, wring excess water from swimmers and reusable swim nappies before placing them in the wet bag. A wet bag helps keep damp items separate from dry clothing, but it is not intended to hold free-standing water.
Wet bags for toilet training
During toilet training, pack one or two complete clothing changes and keep an empty wet bag easy for carers to find. After an accident, wet clothing can travel home separately from clean items.
What size wet bag do I need?
- Small, approximately 25 × 20 cm: suitable for one swim nappy, baby swimmers, reusable wipes or a compact clothing change.
- Large, approximately 40 × 30 cm: better for wet swimwear and a towel, multiple nappies or several pieces of daycare clothing.
A large wet bag is the more versatile option for daycare, toilet training and family swimming days.
Wet bag versus a disposable plastic bag
| Feature | Reusable wet bag | Disposable plastic bag |
|---|---|---|
| Reuse | Designed to be washed and reused | Usually discarded after limited use |
| Closure | Secure zip closure | Often tied or left open |
How to clean a wet bag
Wipe the bag clean between light uses or cold machine wash it when needed. Line dry or tumble dry on low, follow the supplied care instructions and empty the bag promptly after returning home.
How many wet bags does a child need?
One large wet bag covers most everyday needs. Two can be useful during toilet training, frequent swimming lessons or childcare weeks because one can remain packed while the other is being washed.
Frequently asked questions
Are wet bags completely leak-proof?
Wet bags are designed to contain damp items, but they should not be used to carry free-standing water.
Can a wet bag hold dirty daycare clothes?
Yes. A large wet bag can separate food-covered, muddy, painted or soiled clothes from clean items.
Can wet bags be machine washed?
Sarah-Jane Collection wet bags can be cold machine washed when needed. Follow the product care instructions and avoid high heat.
What is the best wet bag size for daycare?
A large bag around 40 × 30 cm is usually the most versatile childcare option.
Wet bags also make practical baby shower gifts and first birthday gifts for one-year-olds.
Set up a clean-and-dirty clothes routine for daycare
Store clean, labelled spare outfits in one section of the backpack and place an empty wet bag where staff can find it. At drop-off, show educators which bag is for damp or soiled clothing. Keep the two uses separate: an unpartitioned wet bag holding used clothes is not also a clean-outfit organiser.
- Before care: confirm complete clean outfits and an empty, dry wet bag are packed.
- After an accident or messy play: follow the centre’s handling policy; used clothes go in the designated return bag.
- At pickup: check what was used and whether another outfit needs restocking.
- At home: empty the bag promptly, wash as required by the product instructions and pack a dry bag for next time.
A second wet bag can be convenient when one is drying, but the number you need depends on attendance and washing routines. The large Blue Whale option is 40 × 30 cm. Avoid overfilling it and do not use it to carry free-standing water.
Need to protect dry contents as well as carry damp gear? Read the wet bag versus dry bag comparison before choosing a bag for electronics, rain or water exposure.
Agree the wet-bag handover with educators
Before buying a daycare wet bag, ask whether the centre accepts reusable return bags and where staff want the empty one kept. Some services supply their own bag or have a specific process for contaminated clothing. Show educators which bag is for used clothes, label it clearly and keep food, bottles and clean outfits in separate spaces.
At pickup, ask which clothing changes were used and whether the bag needs washing. A handover note such as ‘one wet outfit returned, one clean set left’ makes it easier for another adult to repack correctly. Follow the centre’s hygiene procedures rather than assuming a reusable bag replaces every required container.
Work out a wet-bag rotation from your actual week
Start with the number of bags that must be ready at the same time, then allow for washing and drying. One bag can suit occasional use with time to wash and dry afterwards. Two create a useful one-in-use, one-clean rotation for consecutive childcare days. If swimming happens before the daycare bag is unpacked, a third dedicated bag may prevent the clean swim kit being packed beside returned clothes.
For example, a family attending care on Monday and Tuesday and swimming on Tuesday afternoon could use two daycare return bags in rotation plus one swim bag. This is a planning example, not a minimum purchase requirement. Trial the routine first and add another bag only if the clean supply repeatedly runs out.
If you are choosing a bag for pool days, see our wet bags for swimming size guide to compare the small and large options.
For the full wash-and-dry sequence, read how to wash a wet bag, including when wiping is enough and how to check the lining before packing it away.