From Field Logic:

The BLOCK  will stop any arrow, carbon, graphite or aluminum, from even the fastest bows!  Broadheads INCLUDED! Our exclusive "Friction Foam" layers will not bend aluminum arrows like other layered targets can because arrows to enter the target without puncturing.  "I have at least 2,000 shots into The BLOCK, all with broadheads!  It still easily stops every arrow...and I'm shooting over 300 fps!"
		Joel Maxfield, General Manager - Mathews, Inc.