To provide a heat insulating product using pillars and arches for increasing bulkiness without increasing the thickness of padding.

The heat insulating product includes: an outer shell; an inner shell; at minimum of two bridges attached to and extending between the outer and inner shells; and creating a baffle between each two adjacent bridges; at minimum of two baffles; a pillar located in at least two baffles; and an arch located above each pillar. There is also provided a method for manufacturing the heat insulating product.