Whether you're an athlete, a traveler, or just feeling like your O content is a little low, this bundle of Boost Oxygen Natural 4 Portable Pure Canned Oxygen Canister with 1 Pocket-Sized Canister will help you feel refreshed. This bundle comes with (4) 10-liter canned oxygen and (1) 3-liter canned oxygen. The health benefits of oxygen are undeniable. Boost Oxygen has made these benefits readily available in a convenient, lightweight, portable oxygen canister that is 100-percent recyclable. Unlike caffeine, sugar, and other stimulants that can harm the body with extended use, Boost canned oxygen offers supplemental oxygen in a non-prescription form to help every cell in your body. The compact 3-liter size makes this canister great for use on the go and for day trips to areas with a high altitude. This breathing oxygen is all-natural and is ideal for athletes, older folks, or even to help combat jet lag. Supplemental oxygen can even help in workout recovery, as a natural way to get you back to feeling your best. Increase energy and feel better on the go with this Boost Oxygen Natural 4 Portable Pure Canned Oxygen Canister with 1 Pocket-Sized Canister.