Yard sale or goodwill old clothes. Pack em in the bag and shoot away. Blue jeans will take a ton of hits. Wad them up good and tight!
Edit I would say a foot thick to stop most arrows in the 300fps range. also just to be sure you are shooting field tips not broadheads to practice right?
Last edited by Tufrthnails; 08-25-2016 at 01:15 PM.