Attached to the end or an Air Trak or Tumble Trak or used by itself, the Catcher offers a very forgiving landing area that can be adjusting in height by adding foram mats to its 14" high base. The inflated sides allow the Catcher to be a very safe landing surface for many tumbling skills, as well as a PORTABLE landing area for other gymnastic events such as bar, beam and vaulting. Each unit runs from a high-output , constant flow blower (not included).