Ethan BrooksBy Ethan Brooks

Updated November 2026

Cloth diapers work by holding urine and waste in absorbent layers that you wash and reuse, instead of sending each one to a landfill. Once you understand the three parts of the system, the outer cover, the absorbent insert and the fastener, the daily routine is simple. This guide explains how the parts work together and what to do at each stage, from the first change to laundry day.

The Three Parts of a Cloth Diaper

Most cloth diapers combine three functions. The outer shell is usually a waterproof or water-resistant layer, often polyurethane laminate (PUL) or a wool or fleece cover, that stops leaks from reaching clothes and bedding. The absorbent layer sits inside and soaks up liquid. The fastener, snaps, hook-and-loop tabs or a pull-on design, holds everything closed and sets the fit.

Shopping for one? See our guide: Cloth Diapers or Disposable (2026): Which Is Better for Your Baby?.

Some systems are all-in-one, with the absorbent material sewn into the cover. Others are two-piece: a cover with a separate insert you add before each use. Both work on the same principle.

How the Absorbent Layer Holds Liquid

Absorbent materials trap moisture in their fibers. Cotton, hemp and bamboo are common choices. Microfiber is very absorbent but can feel damp against skin if it is the only layer, so many parents pair it with a natural fiber liner. Inserts are often stacked to adjust capacity. Heavier wetters, or children who sleep through the night, usually need more layers.

The outer cover does not absorb anything. It keeps liquid inside the diaper so it stays in the absorbent material until you change it.

Step-by-Step: Using and Caring for Cloth Diapers

  1. Lay the cover flat and place the insert inside, or use the all-in-one as is.
  2. Position the diaper under your baby, bringing the front up so the waistband sits at the belly button level.
  3. Fasten the snaps or tabs snugly, checking that the legs fit without gaps.
  4. After each change, place the soiled diaper in a dry pail or wet bag. Solid waste can be flushed or scraped off first, depending on your local guidance.
  5. Wash on a regular schedule. Most families wash every two to three days, following the manufacturer’s care instructions for water temperature and detergent.
  6. Dry fully before storing, since trapped moisture can lead to odor or mold.

Choosing Products and Routines That Match Your Family

Your baby’s age, weight and output affect how the system performs. Newborns go through many changes and need a snug fit, often with a smaller size or extra soft inserts. As babies grow, they may need larger covers and more absorbent layers. For guidance on picking a style, see How to Choose the Right Cloth Diapers for Your Baby and Types of Cloth Diapers.

Your water and washing machine also matter. Hard water can reduce absorbency, and detergent buildup can cause repelling. If your diapers start leaking, Solving Common Cloth Diaper Leaks and Odors walks through the usual causes.

Laundry Basics That Keep Diapers Working

Washing is what keeps cloth diapers absorbent over time. A typical cycle includes a cold or warm rinse to remove urine residue, then a hot main wash with a detergent suited to cloth diapers. Avoid fabric softeners and products that contain oils or heavy fragrance, because they coat fibers and reduce absorbency. For step-by-step details, read How to Wash Cloth Diapers and How to Rinse Cloth Diapers Properly: A Step-by-Step Guide.

  • A lidded pail with a washable liner keeps soiled diapers contained between washes. View on Amazon
  • A waterproof wet bag is handy for travel and daycare, since it holds wet diapers without leaking. View on Amazon
  • A fitted changing pad with a washable cover keeps the changing surface clean. View on Amazon

Common Mistakes and Tips

  • Using fabric softener, which coats fibers and causes repelling.
  • Letting diapers sit wet in the pail for days, which encourages odor.
  • Fastening too loosely, leading to leaks at the legs and waist.
  • Drying before the insert is fully dry, which can hold moisture and cause mold.
  • Skipping a periodic strip if you notice buildup. Check the manufacturer’s instructions first.

FAQ

Do cloth diapers leak more than disposables?

They can if the fit is loose, the insert is too small for the baby’s output, or the fibers are coated with detergent residue. Adjusting the fit and washing routine usually fixes it.

How many cloth diapers do I need?

Most families plan for 18 to 24 diapers so they can wash every two to three days without running short. The exact number depends on your wash schedule.

Are cloth diapers safe for my baby’s skin?

Cloth diapers are generally gentle when washed and dried properly and rinsed free of detergent. If your baby develops persistent rash, talk to your pediatrician, who can recommend treatment.

Conclusion

Cloth diapers work by pairing a waterproof outer layer with absorbent inserts and a secure fastener. Keeping them absorbent depends on the right fit and a consistent wash routine. With those basics in place, the daily process becomes second nature.

Ready to choose one?

Ethan Brooks

About Ethan Brooks

Ethan Brooks is part of our editorial team and reviews and edits our natural & eco parenting guides, checking product details against manufacturer specifications and owner feedback.