Fabmat is roven woven of some weight with mat stitched to it. weight of it will vary.
It speed's production up.
The vac bag will stick to the laminate, but it peel's off pretty easy.
There should be some imfo for you in my build site.
http://www.classicmako.com/projects/xshark/
On the vac pump. Volume is important. More important than high hg. To much and you can starve the laminate.
15inhg is plenty. You can substitute heavy visqueen [plastic sheeting] for vac bag material. You can use Duct Tape for the seal. Don't buy cheap Duct tape. You really need a peelply and bleeder cloth to take full advantage of vac bagging.