<p>One notable environmental challenge faced by the footwear industry is solid waste management. In order to assure the efficient use of leather scraps discarded during the shoe-making process, this study aims to develop a sustainable solution in the form of insole board. First, several chemicals were employed to remove chromium from leather waste and 93.7% dechroming rate was attained. Then the dechromed fiber was reinforced with various plant fibers to fabricate composite sheets. The evaluation of the composite sheets’ physicomechanical properties revealed that the composite sheets with 20% banana (LF-BF), 20% and 30% hibiscus (LF-HF), and 30% palmyra palm fruit fibers (LF-PF) performed better. To further understand the techno-economic-social feasibility of the developed biocomposite sheets, a hybrid life cycle decision support framework that integrates the fuzzy Best-Worst Method (BWM) and extended fuzzy Multi-Attributive Border Approximation Area Comparison (MABAC) has been used. This framework utilizes quantitative performance data and cost of the composite along with qualitative social perception and environmental protection related data. The LF-HF (70:30) composite sheet was found to have achieved U_i = 0.0410 in the evaluation, indicating that it was both technically and economically feasible for mass production. Furthermore, comparative analysis with extant literature substantiated that the LF-HF composite sheet exhibited a moisture absorption capacity of 49.79%, thereby demonstrating superior performance relative to analogous composite materials documented in previous studies. Using reasonably priced recycled insole boards can be a viable way to cut down on the energy and carbon emissions that come with producing synthetic insole boards.</p> Graphical Abstract <p></p>