So, what you really should be carrying is:
A phone with ICE contacts or no pin lock (Locked phone is useless to someone that finds you lying unconscious in the middle of the trail.
First aid kid is useless without QUICK CLOT This stuff is a life saver I haven’t had to use it, and hope I will never have to It will stop arterial bleeding and save a life.
ID – same reason as the phone
First aid training. Something designed around outdoors and more adventurous sports. You may one day save a life with it.
Spare inner tube, what? Isn’t this irrelevant? No. It can be used as a tourniquet or sling. I’ve heard of guys saving a life by tying a spare inner tube around femoral artery.
Honestly, if you/someone has a injury more extreme then a busted artery, You have a slim chance of making it.
Oh, and always ride in a group. And don’t go to of piste.