With all the snow we've had this winter, I've been so damn bored I cleaned up my tool pack and wrote down some notes. I mainly use this for trail riding. For a dual sport/multi-day trip, I'd add a few more tools/spares and throw everything a backpack.
I've tried a few waist packs and this Zac Speed Matrix is my favorite. It's made of heavy-duty material, uses large zippers, and keeps its contents dry. The design is simple: a single, large main compartment with a few mesh organizers and a clear, quick-access "tail". It comes with a tool roll as well, but it's pretty bulky. I don't use it. I keep a microfiber cloth in the tail to wipe goggles and phone/GPS screens. I'll also throw a snack or sandwich in there while riding.
I stash most stuff in the main compartment:
I use a Dirt Bike Gear tool roll. It's perfect. All their gear is great, go buy it. I only wish they made a fanny pack. I'm sure it'd be perfect as well. I run tubliss/bibs and do not carry tire irons, tubes, &c. so it's not stuffed. Here's what's in there:
The small pocket of the tool roll holds:
A few small containers and plastic baggies get stuffed in the mesh pockets on the fanny pack. These hold spares and (super) basic first aid:
I keep a spare shift lever and brake lever ziptied to the frame in the air box. That's it.