Question on compressed carpet targets

[Jock Whisky]

I understand the construction of these targets but not the reason for gluing them. Can some one educate me?

[Matty]

They aren't glued.  They are compressed. Then They are sprayed on the exterior with like a rhino liner..

[The Whittler]

You don't have to glue them just compress them, you can do the same thing with cardboard. I would thing glueing them would make a mess, he arrow generats heat as it sticks into the target. They make a great target.