Described herein is a cartridge for use with apparatus for heating smokable material to volatilize at least one component of the smokable material. The cartridge comprises a housing defining a chamber, smokable material located in the chamber, and a mass of thermal insulation material located between the smokable material and the housing. Also disclosed is apparatus for heating smokable material to volatilize at least one component of the smokable material. The apparatus comprises an assembly having an interface, and the cartridge, wherein the cartridge is for co-operating with the interface of the assembly.
