You can attach original hoses and filters to classic gas masks. However, we offer you a flexible system for a hose system with many different types - with corrugated hoses made of latex and suitable accessories (e.g. matching bags, dildo with channel and more).
Here you can see the connector for gas masks: You screw it into the round thread of your gas mask (e.g. the Russian gas mask, but of course it fits the globally common round thread with a diameter of 40 mm). Then, you can attach our latex hoses. The play possibilities are limited only by your imagination: Connect the hose via the appropriate Y-connectors with a breathing bag for breath control games, while the third hose may end in a dildo with an air channel.
Also take a closer look at the other accessories of the system.