The Oxygen Reservoir Bag, a major component of the EWOT System, stores pure Oxygen generated by the Oxygen Machine and delivers it to the user via the PATENTED Dual-Inlet Turbo Mega-Flow Mask during the EWOT sessions.
- Universally compatible with any stationary Oxygen Machines
- Made with medical-grade, odor-and-phthalate-free Thermoplastic Polyurethane (TPU) material
- Comes with a PATENTED Turbo Mega-Flow Mask and the essential accessories to kickstart your EWOT journey.
How does EWOT work?
- O2E2 Machine generates Oxygen and feeds the O2 Reservoir Bag
- Reservoir Bag feeds Mega-Flow Mask
- Mask wearer exercises and rests using any stationary equipment.
Why Choose Our Oxygen Reservoir Bag
Exercise with Oxygen Therapy (EWOT) involves inhaling higher concentrations of oxygen while exercising. When you exercise with a 5LPM or 10LPM oxygen concentrator connected with a nasal cannula, you cannot inhale 5-10 liters of oxygen a minute because you are:
- Exhaling half to two-thirds or more of each breathing cycle, losing more than half of the oxygen being produced. The oxygen machine is producing oxygen at a rate of 5 or 10 liters per minute, but you’re not breathing it in.
- Inhaling ambient air along with oxygen, diluting it much more. That may reduce the amount of oxygen your body receives even more.
If you breathe in fewer breaths a minute, as with sleeping, for example, then you will breathe in even less a percentage of O2 per minute. Breathing more will never be able to supply a significant increase due to the ambient air dilution and/or limitations of the moment-to-moment capability of the machine and or a 1-liter reservoir bag/mask.
Now, imagine breathing 25-150 times more oxygen than you ever had while exercising. When you engage in an EWOT session with our Oxygen Reservoir Bag – Turbo Mega-Flow Mask system, you could experience the increased potential of undiluted oxygen upto 150 times more compared to a nasal cannula or a 1-liter Reservoir Bag-Mask by offering you the deepest, fullest oxygen-enriched breaths.
Note that the amount of oxygen inhaled depends on various parameters such as breathing rate, lung size/volume, depth of breathing, and percentage of oxygen mixed with ambient air per breath.
Oxygen Reservoir Bag Sizes
Oxygen Reservoir Bag is available in 2 sizes: 500 Liter and 900 Liter. You can either hang it from the ceiling vertically or horizontally or can purchase an optional Bag Stand.
500 Liter Oxygen Reservoir Bag - Buy Now

- This bag holds 500 liters of oxygen.
- It is ideal for those who plan to split their EWOT sessions into two, each lasting 7-10 minutes.
- When fully inflated, the 500-liter bag measures 5 feet x 3.5 feet x 3 feet.
900 Liter Oxygen Reservoir Bag - Buy Now

- Holds 900 liters of oxygen
- Ideal for engaging in a 12-15 minute long EWOT session.
- The dimensions of the 900-liter bag, when fully inflated, are 8 feet x 3.5 feet x 3.5 feet.
Choosing the Right Bag Size
Lung size and Breathing rate during exercise are the two parameters to be considered when choosing the bag sizes. The bigger the lungs and faster the breath rate, the more O2 is used.
We recommend the 900-liter Oxygen Reservoir Bag if any of the following apply to you:
- You plan for EWOT sessions of 15 minutes or more
- Your height is above 5’8”
- You consider yourself as an intense exerciser
- You’d like to minimize refilling the bag during your workout
The 500-liter Oxygen Reservoir Bag is a good choice for those looking for a more compact and budget-friendly option for shorter EWOT sessions that typically last around 7-8 minutes.
Filling Time
Filling time depends on the Oxygen Machine's flow rate, the size of the Oxygen Reservoir Bag, the duration of the EWOT session, lung size, breathing rate, and number of simultaneous bag users.
900 Liter Oxygen Reservoir Bag
- Filling time when 10LPM Oxygen Machine is used: 90 minutes (1.5 hours)
- Filling time when 5LPM Oxygen Machine is used: 180 minutes (3 hours)
500 Liter Oxygen Reservoir Bag
- Filling time when 10LPM Oxygen Machine is used: 50 minutes (~1 hour)
- Filling time when 5LPM Oxygen Machine is used: 100 minutes (~1.5 hours)
You can also reduce the oxygen flow rate to 1-2 LPM to slowly fill the bag overnight or during the daytime.
What Makes Our Oxygen Reservoir Bags Unique?
- Made of medical-grade, odor-and-phthalate-free Thermoplastic Polyurethane (TPU) material
- Comes with a PATENTED Dual-Inlet Turbo Mega Flow Mask and accessories.
- Can be coupled with a wide range of oxygen concentrators
- Available in two sizes
- No chances of outgassing and oxygen breakdown
- Does not harbor bacteria or mold
- Offers a 2-year comprehensive warranty
- Competitive pricing
- Worldwide shipping
What comes with the Bag?
The package includes the following along with the bag.
- Patented Mega-Flow Mask (Small/Medium/Large) with Head Strap - Delivers adequate flow volume during exercise
- 6 ft. Bag to Mask Connector Hose - Connects/transports O2 from bag to Mega-Flow mask
- Oxygen Supply Hose (14 ft.) - Connects the water bottle to the nasal cannula or 1-liter bag-mask.


