Mouthguards (MG) are used to reduce injuries during contact sports. Thickness of MG material is directly related to amount of energy absorption ability and hence reduction in energy transfer to skull. Many studies had shown that Ethylene Vinyl Acetate (EVA) is best suited material for MG. Studies had been conducted on EVA material to find optimum thickness. As the thickness of Material increases its Impact absorption ability is also increasing. Beyond 4 mm thickness its rate of energy absorption reduces very much, Also beyond 4 mm it is not comfortable for the wearer. Studies were also conducted on the inclusion of air cells in EVA material and showed that its absorption ability increases significantly. But a detailed study using different materials, designs with different combinations were not conducted. So there is a need to conduct studies on it.