Quick answer

A wet bag is a reusable, waterproof pouch that keeps wet or soiled items separate from the rest of your bag. For travel and daycare, hang it on a hook or doorknob for easy access, or pack it flat inside a diaper bag. Use a double-layer bag like the Thirsties Deluxe Wet Bag for better odor and moisture control.

Why Use a Wet Bag Instead of Plastic Bags?

Reusable wet bags are more durable and eco-friendly than disposable plastic bags. They are made with waterproof fabric that contains moisture and odors, so you can reuse them day after day. Many parents find them essential for daycare drop-offs, weekend trips, or even storing wet swimsuits after a pool visit.

A key difference between wet bags is the number of layers. Single-layer bags are lightweight but may let smells seep through over time. Double-layer bags, like the Thirsties Deluxe Wet Bag, have two layers of waterproof material that work better at containing both moisture and odors. If you plan to carry dirty diapers for several hours, a double-layer bag is a smart choice.

Choosing the Right Size and Style

Wet bags come in different sizes and hanging styles. A small bag (around 13 x 10 inches) fits easily in a diaper bag for a few diapers or a change of clothes. A larger hanging bag, like the Smart Bottoms Hanging Wet Bag at 23.5 inches long, can hold a full day's worth of diapers and hangs from a doorknob or changing table hook.

For daycare, a hanging wet bag is especially useful because caregivers can hang it on a hook or over a door, keeping dirty diapers off the floor and out of the way. The Thirsties Hanging Wet Bag has sturdy straps that snap in two directions, so you can hang it over a bar or around a doorknob. For travel, a smaller zippered bag is easier to pack inside a suitcase or backpack.

Caring for Your Wet Bag

Most wet bags can be machine washed and dried on low heat. Wash them with your cloth diaper load or with other laundry. Avoid fabric softeners and bleach, as they can break down the waterproof coating over time. To keep the bag fresh, let it air out between uses and wash it at least once a week if used daily.

One common mistake is overstuffing the bag. A wet bag works best when it is not packed too tightly, because the zipper or snap closure needs room to seal properly. If the bag is bulging, odors and moisture can escape. Stick to the manufacturer's recommended capacity—for example, the Thirsties Hanging Wet Bag holds about 20 diapers comfortably.

Step-by-step: How to use a wet bag for travel and daycare

  1. 1. Choose the right bag for your setting: For daycare, pick a hanging wet bag with straps that can go over a doorknob or changing table hook. For travel, a smaller zippered bag that fits inside your diaper bag is more practical. Checkpoint: Make sure the bag is not too large for the hook or space you have available.
  2. 2. Open the bag fully before use: Unzip or unsnap the bag completely so the opening is wide. This makes it easy to drop in a dirty diaper or wet clothes without touching the inside. Common mistake: Trying to stuff items into a partially open bag can cause leaks or make the zipper hard to close.
  3. 3. Place the bag in an accessible spot: Hang it on a hook, doorknob, or changing table rail at daycare. For travel, lay it flat in a diaper bag or clip it to the outside with a carabiner. Checkpoint: Ensure the bag is secure and won't fall off when items are added.
  4. 4. Add items and seal the bag: Drop in wet or soiled diapers, clothes, or swimsuits. Zip or snap the bag closed completely to trap moisture and odors inside. Common mistake: Overstuffing the bag prevents a proper seal. Leave some room so the closure can fully close.
  5. 5. Empty and wash regularly: At the end of each day, empty the contents into the laundry. Wash the wet bag with your cloth diaper load or on a gentle cycle with cold water. Line dry or tumble dry on low. Checkpoint: If the bag starts to smell between washes, let it air out or wipe the inside with a vinegar-water solution.

Wet bags we recommend

  • Smart Bottoms Hanging Wet Bag: The Smart Bottoms Hanging Wet Bag is 23.5 inches long and has easy-to-unzip one-handed operation. It hangs by handles with large, strong snaps, and excluding straps the bag measures 23.5" long by 20" at the widest point. The long shape and one-handed zipper make it ideal for hanging on a changing table or bathroom hook, so you can drop in a dirty diaper without needing both hands.
  • Thirsties Deluxe Wet Bag: The Thirsties Deluxe Wet Bag is double-lined with two layers of waterproof material to prevent leaking and wicking. It is made in the USA and is more effective at containing smells and moisture than single-layer bags. If you need a portable bag for daycare or outings where the bag will sit in a diaper bag for hours, the double-layer construction gives extra protection against odor and dampness.
  • Thirsties Hanging Wet Bag: The Thirsties Hanging Wet Bag has a waterproof interior and sturdy straps that snap in two directions—over a bar or rail, or around a doorknob. It holds approximately 20 diapers and measures 18"W x 26"W. The two-way hanging system lets you attach it securely in different settings, and the 20-diaper capacity covers a full daycare day or a weekend trip.