Boost Oxygen Cylinder - Portable Oxygen Cylinder for Breathing Up to 100 Uses | Menthol-Eucalyptus Pure Oxygen Can Promotes Free Breathing, assists with Hangovers, Colds, & Revitalizes Lungs 5L

Good size for handbag.

Good product

One measly puff out of it. And that didn’t do much for me. Don’t bother with this product it’s almost a scam. Definitely do not rely on it as a booster if your out hiking or exercising.

I didn't really notice any difference after using this. I used a spO2 instrument to measure my oxygen levels before and after taking the oxygen, and there was no difference (if anything my O2 levels decreased). Not convinced that this makes any difference whatsoever. Also not convinced this is value for money.