I am looking for material to make a backstop. I need something that will stop a fast arrow, about 285 fps. I have never shot used a backstop because I did not need one. I had plenty of extra room incase I let on fly. I am now shooting 60+ yards and know I cannot keep every arrow on the target everytime. I was thinking something along the lines of plywood or something like that. I do not want anything that would damage my A/C/C arrows. Thanks