For your competition jackets, a wash when it really needs it is enough.
For small stains, clean directly on the surface by hand.
Do not hesitate to shake your jacket regularly to remove as much dust and hair as possible.
Let it air outdoors.
For washing, close all buttons / scratch / zips, prefer a delicate cycle at 30 °C / 86 °F maximum on the reverse side, using a mild detergent or organic laundry without softener or bleach or detergent.
For drying, air drying on a wide hanger is recommended to limit markings. Iron on reverse only if necessary.