What is the duration of the sessions offered by the 900 Liter bag and the 500 Liter bag?

With a 900 Liter Reservoir Bag, you can get 15-20 minutes of EWOT.

With a 500 Liter Reservoir Bag, you can get 7-8 minutes of EWOT.

Here’s how it works: An average person breathes around 40-60 breaths per minute during exercise. That would take 7-8 minutes to empty the 500L Bag and about 15-20 minutes to empty the 900L Bag.