All-In-One Diaper (AIO)
Cloth diaper that has an inner absorbent layer attached to an outer waterproof layer with adjustable closures (either Velcro or snaps). All In One Diapers are just like disposable diapers except you wash them!
Easiest to use
Most like disposable diapers
Usually takes longest to dry
Tailor fitted diaper with Velcro or snap closures so cloth diaper fits closely to baby. Requires no folding and uses a waterproof diaper cover.
Still convenient yet less expensive than All In One Diaper or AIO
Easy to use
Very absorbent - great when used as a nighttime cloth diaper
Requires a diaper cover / diaper wrap
Usually takes longer to dry than a Chinese prefold diaper but dries faster than an AIO diaper
Rectangular shaped flat cloth diaper with an absorbent pad already sewn in. Comes in a variety of sizes and thicknesses. Chinese prefold diapers need to be folded to fit in a waterproof diaper cover.
Least expensive diapering option
No need for as many different sizes
Versatile - can be used for other functions such as inserts / doublers, burp clothes, rags, etc.
Requires a diaper cover or diaper wrap
Requires some folding (may require a little practice)
A diaper cover that has an opening for a folded cloth Chinese prefold diaper or specially designed inserts to be "stuffed" into. This is a two part cloth diapering system.
Gives a very trim fit
Most like an all-in-one diaper making it very convenient
Cloth diaper cover with pocket needs to be washed after every use
Can be expensive
Need to "stuff" each cloth diaper with a Chinese prefold or insert
Diaper Cover / Diaper Wrap
Used over Chinese prefold diapers and fitted diapers to waterproof. Diaper covers wrap around baby and secures with Velcro or snaps for easy use (no more pins!). Each diaper cover can be used several times without washing if allowed to air dry between uses. Diaper covers usually can be washed along with diapers (depends on brand and manufacturer suggestions).
Diaper Insert / Diaper Doubler
Both diaper inserts or diaper doublers add extra absorbency to any type of cloth diaper. The difference between a diaper insert and a diaper doubler is the size and thickness. Diaper inserts are typically 3"x11". Diaper doublers are typically 4"x14" and usually are used for older babies.
Fleece pulls the wetness away from baby keeping baby feeling dry. Also, can help with clean-up. Fleece liners do not add extra absorbency.