Contour diapers are between prefolds and fitted diapers. They do not have a built-in closure such as snaps or hook & loop (i.e. velcro). Contour diapers require pins, Boingo(s), a Snappi, or a snug-fitting cover.
Imse Vimse Flannel contour diapers. $8ppd a piece, or $25 for the lot. Some minor staining.