Source Starfinder #8: Escape from the Prison Moon
Item Level 4; Price 2,000; System Feet
A nimble soles augmentation places sets of miniature metal rings that hold the essence of the Elemental Plane of Air on your feet. The rings grant you a +2 enhancement bonus to Acrobatics checks to fly and tumble. In addition, once per day as a swift action, you can overcharge the rings to increase this bonus to +4 for 1 minute.