This invention is for a composite structure and a garment constructed from the composite structure which can be worn next to the skin or as outerwear as well as a process for making the composite structure and garment. The garment provides microclimate control for the wearer by means of at least one three-dimensional passageway formed by an outer cover material which is secured to a first substrate layer. The passageway contains a filler material which adds support to the walls of the passageways and allows a fluid to flow through the filler material. The passageway provides a thermal insulation by its bulk or by allowing a fluid to be pumped through it. The first substrate layer is breathable to increase the comfort level of the wearer.