I use throw away plastic. Bubble wrap, plastic bags, packing material etc. Pack it really tight, the tighter the better, (into a big trash bag usually) then into a card board box, (might need help pushing it into the box, then taping it shut), this makes a great target, it's usually free, (local stores like to get rid of the stuff), and expendable, and lasts quite a while. Works for me, stops arrows from my Dalaa (#55) that shoots and penetrates arrows as deep as my #70 compound (forgive me for having a wheelie bow, I don't shoot it any more :-) )