Onewheel Pint, Concave Foot Grip Pads, Fishbones Accessories (DIFFERENT COLORS)

They're printed in tpu and are flexible but still rigid enough to serve its purpose. These help a lot with foot fatigue and with carving. They also improve grip and look pretty cool too. You can use two for the back foot and leave the front flat or you can buy two sets and put them on both sides.