When we first decided to try cloth diapers, I was overwhelmed by the huge number of styles, brands, materials, etc.

Cloth diapers have changed a good bit since I was a child, and thankfully, most of the changes have been for the better.

There are so many different options and brands, that I can’t cover them all here. I’m going to hit the high points on the most common abbreviations and terms that I’ve seen in my search to find out more about the world of cloth diapers.

AIO — all-in-one diaper. These diapers are fitted and have a waterproof outerlayer that is usually made of polyurethane laminate (PUL) and an inner layer made of a soft, fleece type of material. An insert to absorb extra liquid is also included with these diapers, some are detached, while others aren’t. These diapers are usually attached with velcro or a snap. The outer layer of these diapers cannot be put in a dryer.

AI2 — all-in-two. These are similar to AIOs, except the insert is not attached to the diaper. It’s a separate piece that must be used with the diaper.

Contour diapers — these diapers are contoured to better fit baby. Snappis or pins and a diaper cover must be used with these.

Diaper covers — these are waterproof layers for diapers that are not waterproof (contours, chinese prefolds, fitteds, indian prefolds, etc.) These are usually not dryer-friendly.

Doublers — these are absorbent pads that can be added to diapers to increase absorbency.

Fitteds — These look a lot like disposable diapers. They fasten with Velcro or snaps (like AIOs) but require a waterproof cover.

Flats — These are what I like to call old-timey diapers. They are a flat sheet that you fold and pin to fit your child. These requires pins or snappis and covers.

Liners — Extra cloth strips that are placed inside the diaper to soak up extra urine.

Pre-folds — Rectangular shaped diapers that must be folded into a diaper shape. Although similar to flat diapers, these have more layers of fabric in the middle. You have to use a cover with these diapers. There are two common types — Chinese and Indian.

Pocket diapers — Similar to AIOs, these have a water-proof outer layer and a soft, absorbent inner layer. They fasten with snaps or Velcro. They have a pocket for you to insert extra liners for more absorbency.

Snappi — Plastic T-shaped grippers that fasten cloth diapers. They are an alternative to diaper pins.