I found a back pack that is perfect for toting LVAD gear

I found a long narrow back pack that is perfect for carrying my extra batteries and extra controller. It's a perfect size and is very comfortable. Now when I walk around with the extra gear, I hardly notice I am carrying it, and it helps me to stay more balanced and stand up straighter. I found this backpack on Amazon, it is for a portable oxygen tank. Here is the link. Eva Medical Oxygen Cylinder Backpack Bag M6/M9 Cylinders.