<p>Sandwich composite structures have taken great attention in industrial applications due to their superior performances. In this study, sandwich composite structures constructed from Nomex Aramid Honeycomb as cores, while 2D- and 3D-glass woven laminates without and with high density polyethylene (HDPE) used as skins. Flexural strength tests were used for all samples to study their capability for carrying-load and investigate their damage failures. The finite element analysis (FEA) with commercial software was also adopted to predict the damage failure modes for samples under flexural strength tests. The simulated results agreed well with experimental findings, validating the model's accuracy. Results showed that the flexural strength and stiffness are increased with skins that have 2D-glass woven composite only. However, the reduction of flexural strength and stiffness occurrs with the combination of 2D-woven skins with HDPE. Moreover, the 3D- glass woven composite skins revealed superior core shear strength compared to sandwich panels that have 2D- glass woven composite skins. The sandwich panels that have 2D-glass woven fabric skins with thermoplastic particles revealed higher specific energy absorption <i>(SEA)</i> compared with those having 2D glass fabric only. Furthermore, sandwich panels that have 3D-glass woven fabric skins with thermoplastic particles showed superior capability to absorb energy of approximately 780% in comparison with sandwich structures that have 2D-glass fabric only. Overall, the highest value and balanced combination of strength, stiffness, and specific energy absorption were resulted from 3D-woven, which makes them a potential skin for applications that require composites with high performance.</p>