A metal-organic framework (MOF) body that includes MOF crystallites adhered to each other via a MOF binder is provided. In one embodiment, the body consists of: MOF crystallites; a MOF binder which binds the crystallites together in the body; optionally, residual solvent; and optionally, one or more additives, where the additives are present at a level of not more than 10% by mass. The MOF binder may have substantially the same composition as the MOF crystallites. Alternatively, the MOF binder may have a different composition to the MOF crystallites.