If your didn't think you could increase your athletic performance levels even more, well we found a way or should I say they have found a way. (video) Athletes all around the world have added the Mass Suit and Bas Ruttens O2 Trainer together to increase their levels in there performance. Resistance training with resistance bands and with resistance exercises for your lungs is ideal. What it does is increases your endurance and stamina tremendously. Your Your speed, explosion, power and agility increases. When you take off the Mass Suit and take out the O2 Trainer you will see the biggest difference in your athletic levels than you have ever seen. It's a Must BUY PACKAGE!!