Pre-filled, free shipping. Corn cob filled i believe, you get the front and back, and they even have straps and clips. After all these years i finally broke down and bought a set. I think as far as for me, i cant see getting a sled or rest right now, if i didnt have to load and unload it at the range i would more than likely get one. But when i go to the range, i want to keep as simple as possible as to get in and get out. So im not holding anyone up. If i had my own lan? For sure, I've tried one and they are great. Not willing to put a purchase in yet until the Army tells my wife where shes going next, this will be our last move, the tenth one at that, and we are in a constant state of not getting stuff because we dont know where we will be, hence no reloading yet, shooting gear, minimal equipment, looking forward to a permanent house, thats ours to do what we want. But, the guys here can tell you what you need, and what would be nice to have. I got the rests because my hands shake quite a bit and my eyes arent what they used to be. A good rest helps.