Indoor or recirculation tunnels allow customers to learn to fly very quickly. The flyer is positioned inside a perimeter-bound protective glass. This boundary ensures that flyers stay in the airflow throughout the session and learn flying positions more easily. 

Recirculation tunnels are typically used for integration inside buildings, for example, shopping malls. This technology is equipped with a climate control system and is weather independent, thus being a great solution for very hot as well as cold, and rainy climate zones.

Due to the enclosed or recirculating air loop this technology can generate very high airflow speeds up to 300 km/h (186 mph). It is one of the main factors why indoor tunnels are so popular among skydivers. High airflow speed allows skydivers to challenge and push the limits of their flying skills. However, for those who try this experience for the first time airflow speed of 220 km/h (136 mph) is completely sufficient.

Recirculation tunnels can also accommodate competitions. Tunnels with flight area diameter of 4.3 m (14 ft) have been accepted as a competition standard for World Indoor Skydiving Championships. AERODIUM tunnel in Bahrain hosted the World Indoor Skydiving Championship in 2018.