I have been using a regular old paper shop mask with my machine for a while now.  But recently I started experimenting with plywood using some crufty old wood from my local big box store and the dust has been making me cough for hours afterwards.  To save my lungs I decided it was time to invest in some proper safety equipment.

I picked up a medium grade dust bag for my shop-vac, new safety glasses with flexible frames, and most importantly a new 3M respirator with particulate filters installed on it.  The respirator is working great, it is comfortable and forms a tight seal even with my beard, and most importantly no more coughing.  The shop-vac is running hotter than I remember it, but that may be because of my longer cuts rather than the bag.