This is a full-fledged rebreathing system. It is compatible with Israeli and Russian gas masks, allowing for breath play! ■Product Details Rebreathing System (Bag, hose 60cm) *Please note that this item is short. It's more of a product to be used while lying down. ■Product Condition The rebreathing system is unused, but it has been stored for a long time. Please refrain from purchasing if you are looking for a new item.