Then, were made the wood panels mixing the IPW particles in the inner layer of the MDP, considering the 4 conditions specified in Table 1. Following, Fig. 2 shows a mattress with the wooden chips and the IPW particles in the inner layer of the MDP, before the hot pressing process. Step 1 in Fig. 2 shows a overall view of the mattress before the hot pressing process, and step 2 details the three layers of the MDP, where the IPW particles are located just in the inner layer as recommended in this study.