Can survive in the vacuum of space for nearly a week

"You cannot grasp the power of the Super Saiyan transformation, Cooler! In preparation for a situation just like this, I trained myself to use my Super Saiyan energy to isolate the oxygen around me and draw it into my lungs, compressing it until it entered a liquid state. The heat from my transformation insulates my body, allowing me to return the oxygen to a breathable form as I need it. With my lungs just half full, I can survive for nearly a week on nothing but my own power! I prepared a reserve of oxygen with this technique as soon as I transformed earlier. Your trump card has failed, demon. Prepare to meet your end."

- Bringer of Death Chapter 18