Exemplary embodiments of a multi-layer composite pulp product comprise one or more pulp layers, and one or more reinforcement layers disposed therebetween. Each of these layers preferably include a respective pattern of opposingly-defined cavities and protrusions, wherein the mutual disposition of the layers results in their patterns axially aligning with one another. The reinforcement layers may be comprised of a recycled plastic, a metallic mesh or a metallic sheet. One example process for manufacturing a multi-layer composite pulp product may comprise fabricating a reinforcement layer, forming a soggy first pulp layer, placing a reinforcement layer on the soggy first pulp layer, forming a soggy second pulp layer, and positioning the soggy second pulp layer on the reinforcement layer. A precursor wet composite may thereby be formed, and may be dried at a selected heating temperature and under a selected pressure.