If you read the web site Spider is a loose fill insulation that can be sprayed. You can spay regular blowing wool if you want . I have sprayed Insulsafe way back when. Spider can also be used as a retrofit insulation that can be installed in a wall cavity or blown in an open attic.

Talked to a Jm rep. because I am interested in the product. The spider can be installed in an open attic, but they do not support the coverage chart for an open attic because quit frankly they don't want to strip sales from their regular attic product.