Take your pick! Some of these accessories are non-negotiable must haves, some are optional. A lot of people do just fine with regular inserts/doublers and never feel the need for hemp. Others can't live without the absorbency and prefer less bulk. If you choose not to get these, please consider suitable alternatives. For instance, some people choose to use a prefold or folded flat diaper to serve as doublers or inserts. You can use disposable wipes with cloth diapers but they cannot be washed with the diapers and most are not flushable (you'd need a separate bag for these when changing).
Here are a few of the options we have available.

Doublers/Inserts

The only thing that is differenct about Inserts vs Doublers is that"inserts" are used in pocket diapers and "doublers" may have a more contoured appearance.
Doublers can be used as inserts (if they fit) and inserts can be used as doublers.

Doublers/Inserts

Doublers by Thirsties® Available in boys' or girls' colors

Hemp Inserts by Thristies® More absorbency with less layers than other fabrics

Wet Bags

Wet Bag by Thirsties®

Wet Bag by Whamies® Available in 3 sizes!

Pail Liner

Diaper Pail Liner by Thirsties®

Diaper Pail Liner by Whamies®

Wipes

Wipes by Thirsties®

Snappi