O2 Blast - Portable Oxygen Can, Filled with 99.99% Pure Oxygen in a Can with Breathing Mask for Sports, Travel, and High Altitude Use | On-The-Go Air Support for Hiking and Outdoors – 10L, 6-Pack

Clears the sinuses and the mind too. Simple and rational use makes this a great thing if feeling a little run down.

works as published, I use it when I fly. There is a odd flavor/taste to the O2 other then this it works well

Works great. No difficulties at all. I get about 25 inhaling shots out of each can.

Great product but over priced...

Really useful . When you need a breath, this works great

This product very good 02 I been using for over 2yrs. I feel so much better then the 02 concentrator thx

There is never anywhere near what it advertizes as 2oo blasts of oxygen. Never more than 50.

These are extra excellent when used for a brain boost to alleviate fatigue as well as a crucial part of anyone's first aid bag. They're easy to use extremely lightweight and have a long shelf life. I highly recommend them.