Target bag filled with a neoprene material that absorbs the impact of the arrow. 

Start to shoot through, give the bag a shake and the contents will refill the hole.

Our test target has had around 4000 arrows in it and still going strong, shot mostly at 13m with a compound bow. 

Not for broadheads. 

You may get some pass through so don't mount against a hard surface like a brick wall. Give yourself some gap.