Fitted Diapers are made from more varieties of fabric than you can imagine; 100% cotton (bleached and unbleached), certified organic cotton, cotton fleece, cotton velour, and even hemps and sherpas. Absorbency, as well as price, will vary with the type of fabric used to sew Fitted Diapers.
More often than not, Fitted Diapers are gathered with elastic (encased or not) at the thighs and waist and secure with velcro and snaps on the wrap-around wings; there are a few versions without snaps or velcro closures that require a diaper pin, snappi fastener or a wrap-style diaper cover to secure them to baby.
They look and cut resembles a disposable diaper, but without a waterproof outer layer, so Fitted Diapers do require a cloth diaper cover to contain seepage when baby wets. Fitted Diapers do not require any kind of cloth diaper folding to use