Abstract: A heat-insulating lining for a footwear article includes an enclosure body made from an air-impermeable thermoplastic material and defining an inner space, and a porous layer disposed in the inner space such that the enclosure body encloses the porous layer intimately. The inner space in the enclosure body is in a vacuum state.

Abstract: A process for preparing EVA foam includes the steps of placing an amount of a kneaded composition in a mold such that the volume ratio of the kneaded composition to the mold cavity is about 0.15 to 0.5 and such that the kneaded composition is laid on the lower mold half, heating upper and lower mold halves of the mold in a manner that the temperatures of the upper and lower mold halves are not less than a reaction temperature, at which foaming and curing of the kneaded composition take place, and raising the temperature of the upper mold half to be higher than that of the lower mold half when the kneaded composition expands to a volume such that the volume ratio of the kneaded composition to the mold cavity is about 0.9 to 0.95.