Integrated adsorption and heat exchanger devices are provided for solid sorption refrigeration systems (1), together with methods for making such devices. An integrated adsorption and heat exchanger device (20, 30, 45, 52) comprises a solid material having formed therein both a porous adsorption structure (21, 31, 44, 53), which is pervious to an adsorbate of said system (1), and a heat exchanger structure (22, 32), which is impervious to said adsorbate, for heat exchange with the porous adsorption structure in operation of the system (1).