The fully inflated buoy has a buoyancy of 75n, which is over 7 kg of lift. Leaning onto the Restube buoy keeps your head above water. Restube helps no matter how tall you are. If you are wearing heavy clothing like shoes, you should take them off in a critical situation. The buoy can also be orally inflated. After use you can restore it back into the small pocket. You can wave with the buoy, to call somebodies attention. The high quality material of the RESTUBE buoy meets the European norm 12402 for lifejackets. You can be sure to have a high quality and long lifetime product in your hands that keeps the air even in rough conditions. Every single buoy gets checked for firmness after production.