الفهرس 
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Abstract
This research aims to produce cotton coverlet from self stitched double fabric based on honeycomb structure for both layers. As the pyramidal shapes of each layer of honeycomb were aimed to face each other to form closed small air chamber to increase fabric thickness which may lead to improve thermal comfort. A number of samples were produced with different weft densities and counts, then the thermal, geometrical and mechanical properties were measured and compared with reversible weft backed fabric which produced from the same weft yarns. In addition to an attempt to investigate the relation between light permeability and thermal properties for both structures was carried out by an optical method. The results showed that the thermal properties of the suggested structure are better than reversible weft backed structure and there is a relationship between light permeability and thermal properties. The aims of the thesis: - Innovation of a new structure based on honeycomb to benefit from the fabric thickness, pyramidal shapes and producing double honeycomb so as air pockets can face each other to form air chambers. - Evaluate the effect of weave structure at different densities and counts of weft yarns on the thermal properties of double honeycomb and compare with reversible weft backed - An attempt to test the relationship between light permeability and thermal comfort properties.