A jetpack is a wearable device that allows a person to fly by using jet propulsion. It typically consists of a backpack-like structure with engines that generate thrust, lifting the user off the ground. Jetpacks can be powered by various fuels, including liquid fuel or compressed air, and are often used for recreational purposes, demonstrations, or in some cases, military applications. The concept of jetpacks has been popularized in movies and television, often associated with futuristic technology. While they have been developed and tested since the mid-20th century, practical and safe use in everyday life remains limited. Advances in engineering and materials continue to improve their design and functionality.