Insect exoskeletons are hard outer coverings that provide support and protection to insects. Made primarily of a substance called chitin, these exoskeletons help prevent water loss and shield insects from predators and environmental hazards. The exoskeleton also plays a crucial role in the insect's movement, as muscles attach to the inside of this rigid structure. As insects grow, they must shed their exoskeletons in a process called molting. This allows them to expand and develop into larger forms. After molting, a new, softer exoskeleton forms, which gradually hardens over time, ensuring the insect remains protected as it matures.