Abstract: Temperature protection assemblies (18) designed to protect objects (10) against undue temperature changes during shipping or storage, comprise a first layer (20) configured to be placed proximal to the object (10) and include phase change material, together with a second layer (22) configured to be placed over the first layer (20) and remote from the object (10), the second layer comprising a heat-reflecting material (50). The assemblies (18) may be designed to protect a single carton (10) or a pallet load thereof and, in such cases, the layers (20, 22) are in the form of open-bottom covers, which can be fitted over the carton (10) or pallet load in closely-conforming relationship, with the first layer (20) adjacent the carton (10) or load, and the second layer (22) telescoped over the first layer (20). The covers (20, 22) may be interconnected to form a unitary assembly.