This is a no-brainer. Every motorcyclist is going to own a jacket, and to varying degrees that jacket will be armored -- whether simply a denim jacket with leather elbow patches (not recommended) or a thick leather jacket reinforced with carbon-fiber supports and molecular armor (recommended).
What's that, you say? Molecular armor? Added to the mix of hard armor (like a plastic shell) and soft armor (like memory foam) are materials that are flexible and soft like a liquid until smacked with pressure as in a crash, at which point they turn rigid. It's like that trick with cornstarch and water: Push it gently and it's a goopy liquid; smack it and it's suddenly a solid that your rebounds your hand.
It's a very cool material, and it's available today.