Osprey Raptor 30 (I think)
Love the back system/bladder – really, really comfortable an stays put brilliantly. Way better than the Dakines and Camelbaks I’ve used. Magnetic valve thingy is a PITA. A) you have to do the chest strap up B)I’m forever having the valve pop off the chest strap. This was over a pressure suit, which may not have helped.
Plenty of sensible pockets to stop everything rattling around, including waist belt ones to keep the multitool and phone in and handy without taking the pack off. Main compartment still a good size though.
Built in rain cover is a godsend.
Relatively lightly built, so I wouldn’t want to crash in it too often, but then if you’re leading/guiding you shouldn’t be riding at 100% anyway. (broken guide=chocolate teapot. Been there, done that, hopefully learnt the lesson)