It’s not anything I ever want to see again. Tucking a ponytail down the back of a jacket is NOT adequate. The accident at an Enid, Ok. race was due to a ponytail working it’s way back up out of a jacket. The KART rulebook suggests a hooded t-shirt, and it’s a very good solution. Most folks I’ve seen with them cut them off just below the arms so it’s not too hot. No way your ponytail is getting anywhere near the axle if you are wearing that.