Just like our Save A Dive Kit, the Advanced Save A Dive is even more unique. We have added a second fin strap, fin strap buckle, yoke knob, octo holder, low pressure tire/ball inflator, din-to-yoke fill converter, paint marker, and a 40 piece O-Ring kit. With your choice of a soft rollup case, that will fit in our Save A Dive Accessory Pouch and attach to your first aid kit, or a SEAHORSE© SE520 hard case. Why take the risk of your gear breaking right when you need it most, and not having the things you need to fix it. Can you dive without one? Yes, but why would you.