Turbo Oxygen Reservoir Bag (EWOT Bag)

The oxygen reservoir bag is one of the three components of the Turbo Oxygen EWOT system: concentrator, reservoir bag and mask. It stores oxygen from your oxygen concentrator and delivers it to you through the patented dual-inlet Turbo Mega-Flow Mask during EWOT (Exercise With Oxygen Therapy) sessions.

  • Works with any stationary oxygen concentrator. A continuous-flow concentrator of 5–10 LPM is ideal.
  • Made of odor-free, phthalate-free thermoplastic polyurethane (TPU)
  • Comes as a kit with the patented Turbo Mega-Flow Mask and connector hoses

How does an EWOT reservoir bag work?

  1. Your oxygen concentrator fills the reservoir bag.
  2. The bag feeds the Mega-Flow Mask through two connector hoses.
  3. You wear the mask while you exercise on stationary equipment, such as a bike, treadmill or elliptical.

Why use a reservoir bag?

An oxygen concentrator makes oxygen at a steady rate, for example 5 or 10 liters per minute. During exercise you breathe far more air per minute than that. With a nasal cannula connected straight to the concentrator, two things limit how much of that oxygen you breathe:

  • The concentrator keeps producing oxygen while you breathe out, and that oxygen is lost.
  • Each breath mixes the oxygen with room air.

A reservoir bag solves this. The concentrator fills the bag between sessions, and during your session you breathe from that stored supply through the mask, faster than the concentrator could make it. How much oxygen you take in still depends on your breathing rate, lung size and depth of breathing.

Oxygen reservoir bag sizes

The bag comes in two sizes: 500 liters and 900 liters. You can hang it vertically or horizontally from the ceiling, or use the optional bag stand.

500 Liter Oxygen Reservoir Bag – Buy Now

500 liter EWOT oxygen reservoir bag dimensions: 5 ft x 3.5 ft x 3 ft

  • Holds 500 liters of oxygen
  • One full bag lasts about 8–10 minutes of EWOT
  • Size when fully inflated: 5 ft (H) x 3.5 ft (W) x 3 ft (D)

900 Liter Oxygen Reservoir Bag – Buy Now

900 liter EWOT oxygen reservoir bag dimensions: 8 ft x 3.5 ft x 3.5 ft

  • Holds 900 liters of oxygen
  • One full bag lasts 15 minutes or more of EWOT
  • Size when fully inflated: 8 ft (H) x 3.5 ft (W) x 3.5 ft (D)

Note: how long a full bag lasts depends on how vigorously you exercise. The session times above are for vigorous exercise. At a lower intensity, a full bag may last longer.

Choosing the right bag size

Your lung size and how fast you breathe during exercise decide how quickly you use the oxygen in the bag. The bigger your lungs and the faster you breathe, the more oxygen you use.

We recommend the 900 liter bag if any of these apply to you:

  • You plan EWOT sessions of 15 minutes or more
  • You are an athlete or an intense exerciser
  • You want fewer refills during your workout

The 500 liter bag is a more compact, budget-friendly option for shorter sessions. A typical routine is two sessions of 7–8 minutes a day, about 15 minutes in total, refilling the bag between them.

How long does it take to fill the bag?

Fill time depends on your concentrator's flow rate and the bag size.

900 Liter Oxygen Reservoir Bag

  • With a 10 LPM oxygen concentrator: about 90 minutes
  • With a 5 LPM oxygen concentrator: about 3 hours

500 Liter Oxygen Reservoir Bag

  • With a 10 LPM oxygen concentrator: about 1 hour
  • With a 5 LPM oxygen concentrator: about 100 minutes

You can also set the concentrator to 1–2 LPM and fill the bag slowly overnight or during the day.

Setup and care

  • Space: allow about 25 sq ft for the bag setup, plus room for your concentrator and exercise equipment. Keep the bag 1–2 ft away from the wall, and give the concentrator 1–2 ft of clearance on all sides.
  • Mounting: the bag has grommets on all four corners. Hang it vertically or horizontally from the ceiling with S-hooks, or use the optional bag stand.
  • Overfilling: a built-in pressure relief valve keeps the bag from over-inflating. To switch off the concentrator automatically, add the auto timer in the EWOT Accessory Bundle.
  • Between sessions: you can leave the bag filled for 24–48 hours. A small amount of oxygen may slowly escape through the pressure relief valve; this is normal.
  • Cleaning: the bag does not need to be cleaned.
  • Storage: keep the bag in a cool, dry place, away from direct sunlight and sharp objects that could puncture it.

What comes with the bag?

Each reservoir bag kit includes:

  • The oxygen reservoir bag (500 or 900 liters)
  • Patented dual-inlet Turbo Mega-Flow Mask with head strap, in Small, Medium or Large
  • 6 ft bag-to-mask connector hoses (2): carry oxygen from the bag to the mask
  • 14 ft feeder hose (1): connects your oxygen concentrator to the bag

The bag stand, an additional mask and other accessories are sold separately.

Warranty and shipping

  • 1-year warranty
  • Free shipping on orders over $250 to the 48 contiguous US states. We also ship worldwide.

Ready to start?

Already have a stationary oxygen concentrator? Shop reservoir bag kits. Starting from scratch? Get the concentrator, bag and mask together in a complete EWOT system.

If you use oxygen for a medical condition, talk to your doctor before trying EWOT. EWOT is not a medical treatment.