O2totes Ultra LightWeight Backpack Fits The Inogen One G4/OxyGo Fit/Lightest Backpack for The Inogen One G4, under 10 ounces

Bought this for the wife as she has an Inogen concentrator. It takes a bit to get set up and fitted to your person but seems to work quite well once done. Takes the weight off your shoulder. It comes with a battery spacer for single batteries. Remove it for double batteries.Seems well made for the money. Hope to get a long life out of it.

This has been a life enhancer!! Easy to use, well manufactured, and light weight. Now I can slip it on with my Innogen o2 tank and off I go. Both hands free now and it is very secure.

Yes, according to the product information, it does have a removable chest strap. The product bullet point states that it comes with "adjustable backpack straps, removable chest strap for even more comfort."

I have an Inogen G4 and this bag is the perfect backpack for it. Zips along the bottom which allows me to change batteries without removing the entire unit. The top also opens, allowing direct access to the top of the unit. The aluminum nozzle is not obstructed by the case. Additional holes in the back of the bag are metal grommet reinforced so the bag will last a long time and it can be washed without fraying.

I have the Inogen Rove 4 and this backpack fits like a glove. It’s very well made.

Got this bag for my Inogen G4.Machine fits perfectly, has chest & belly straps which I don't use for the intended purpose. I may on vacation.I kind of worked the belly strap into the clasp strap for the top piece & use it with a carabiner to secure the machine to the handrails in the disability friendly bathrooms. Could work if I had a mobility chair as well.I had to cut into the plastic top a bit because it was not far enough out for my hose-but literally 1/2 inch.I carry it as a sling or backpack. The velcro hose holder got used up-but I used some velcro cord holders to replace it-works well, but messy. A small buckle strap would suffice & I may add one in the future.The stitching quality is good, I didn't need pockets, or anything fancy. I needed this for work & minimal was paramount because of job restrictions.If there was a con-it's that the back vents rest against the body & block them causing the machine to randomly stop. I cut a piece of pool noodle lengthwise & inserted in bag to rest against my back & pull the machine away from my clothing.A "bump" in the back cushion could help solve this.You can leave the bag on for charging-I have a car charger, so this is awesome!Battery changes are super easy-no disconnecting tubing or anything.I've taken it fishing, use in my checkstand as a cashier. REALLY expands my freedom.I have been touting this bag to customers since I got it. Love the lavender color, makes my o2 so much cuter.I will buy another one when I have to move up in machine size.

No side pockets.

The bottom zipper wears out pretty fast, but over all is an excellent product.