it have be say in a couple of review now but people need to understand this be a new version of the bag -lrb- mine ship September 2011 -rrb- and it do have a zipper to empty it out on the bottom . the material be similar to the material on the bag for my bosch planer and it have hold up fine for a while now . it do a great job catch the dust that go through the dust port , of course you will still get dust from other part of the table saw , but versus no bag \/ vacuum it be a huge improvement and for the price I would recommend it to anyone . it be a 5 star product .