Hello Noah, Thank you for your inquiry! The VR Technology Sentinel Scuba Rebreather is one of the best units on the market and is readily from the manufacture. But your son needs to become SCUBA certified 1st before getting into rebreathers. Please give us a call tomorrow and we can discuss the process. Here’s a link to a great article about rebreathers and please note the last paragraph: http://www.scubadiving.com/training/basic-skills/rebreathers-101
http://www.scuba.com/scuba-gear-157/131707/VR-Technology-Sentinel-Rebreather.html If you would like to place an order or have questions about our products, please contact one of our certified Dive Instructors at SCUBA.com by calling 800-247-2822 <> 949-221-9300 or e-mail us at: info@scuba.com