Up your oxygen game with this energy-infused canister of Oxygen Plus's O+ Biggi. Each O+ Biggi oxygen canister is packed with 220 breaths of pure recreational oxygen. The O+ Biggi is the perfect extra-large pick-me-up for sports and big adventures - take it with you on long-haul hikes, while you train for a marathon or when you're facing a stressful workweek. A few deep breaths from the O+ Biggi will help keep you alert, energized and ready to conquer the day. The O+ Biggi delivers oxygen through a designer, proprietary mask. To use, simply place the mask to your mouth, squeeze the trigger and inhale.