Nanocompressors was an update released in the 2.2.0 Update. Nanocompressors help with speed, fall damage, and energy regeneration. They also give a boost to your armor. Although you can not seen them, you do get a shield (See Shield Article) that acts as an indestructable device. You can only rent nanocompresoors, not actaully buy them permentently. It costs 1000 xp per day to use. There is no fall damage too, so this is good for Gravity Gunners.