The AirZone Jump 8' In-Ground Trampoline is an innovative way to bring trampoline fun to your backyard without the view from over the fence! This 8 foot diameter trampoline requires a small pit underneath the jump surface, and once installed will allow your young jumpers to bounce ...The AirZone Jump 8' In-Ground Trampoline is an innovative way to bring trampoline fun to your backyard without the view from over the fence! This 8 foot diameter trampoline requires a small pit underneath the jump surface, and once installed will allow your young jumpers to bounce freely and easily without having to climb in and out of an elevated trampoline. Our UV resistant jump pad and frame cover, high-guage steel frame, and zinc-gold steel springs will ensure that your AirZone trampoline will last for several years of backyard fun! It's time to Jump like you mean it!