A pony package allow divers the reassurance of total self sufficient redundant alternate air supply. The 3l Faber is a lightweight steel cylinder that will accept either International A-Clamp or DIN fitting regulators. The Cressi Sub XS2 is a rugged, high performing regulator that offers low on going servicing costs and great reliability. The twin bands ensure the pony remains firmly against your main cylinder avoiding the wobbling that pony sacks tend to offer.