Get you some burlap bags and shove them full of plastic sheeting, shrink wrap, or plastic bags. Pack them in there good use your legs and really push them in there. Then sew the top shut. This is cheap, easy and last a long time. When you start wearing big holes in it, simply slip another bag over the whole thing sew the top and shoot some more. Burlap bags can be bought at feed stores, gardening centers, hardware stores like menards there not to hard to find and usually are only a buck or two. Plastic sheeting can be gotten free most of the time from furniture stores. Ask the manager for some or check there trash dumpster! It is amazing how many shots these can take!