A high-altitude jump, often referred to as a high-altitude high-opening (HAHO) jump, involves parachuting from a significant height, typically above 10,000 feet. This type of jump allows parachutists to glide over long distances before deploying their parachutes, making it useful for military operations and recreational skydiving. During a high-altitude jump, jumpers wear specialized equipment, including oxygen masks, due to the thin air at high elevations. The jump usually requires thorough training and preparation to ensure safety and effectiveness, as the altitude can pose risks such as hypoxia and rapid decompression.