Composite materials blend diverse materials to create a new one with unique properties. These materials are divided into two types: synthetic and natural. Synthetic composites, like glass fiber, are strong and durable but environmentally unfriendly due to their non-degradable nature and the high energy required for production. Conversely, natural composites are made from renewable plant fibers and are environmentally friendly, offering advantages such as degradability and lower production energy. The shift toward natural composites is driven by the global push for sustainability and reduced environmental impact. This study examines Pineapple Leaf Fiber (PALF) and banana fiber as sustainable alternatives to synthetic fibers. It explores their historical background, extraction methods, and applications, highlighting their environmental benefits, including sustainability and degradability. PALF is noted for its excellent mechanical strength and cost-effectiveness, making it ideal for the textile and paper industries, among others. Banana fibers, known for their flexibility and strength, are versatile in textile production, craftwork, and composite reinforcement. This research underlines the growing interest in these fibers for their eco-friendly properties, contributing to the development of sustainable materials science. It addresses the challenges in enhancing these composites’ performance and suggests future research directions. Adopting natural fiber composites is a significant step toward sustainable material engineering, emphasizing the need to move from synthetic to natural materials in various sectors.