Ok, so I originally wrote a review a few years ago but I’m scrapping that and here is everything you need to know. The 12 inch (35 lb) Aqua bag is NOT a bag that you’re going to pound away on although you can. The intent of this bad is to practice 1–2-Hook combos, and light uppercuts. Light meaning don’t smash it so it lifts off into the air it’s 35 lbs if filled to the brim.HOW MUCH TO PUT IN: 32 to 33 lbs is the sweet spot I found. Once you get to 34 lbs to 35 lbs, which by the way don’t go over the bad loses the ability to swing easily unless you hit like a tank. I personally have 33 lbs.WHAT IT COMES WITH: The bag, Water filling Nozzle, and a stopper plug. It comes with the horseshoe shackle, but does not come with a chain. Buy a decent one at Home Depot or Lowe’s. Will cost like $6 or $8.HOW HIGH TO HANG: Around head height or a Tad above.The Sensor they sell separately will NOT work with his bag.Ok, so my overall opinion, I like this bag it’s not to replace a slip bag it’s not replace a double End bag, however it gives me the ability to punch and move, slip punches and put some power behind it without going overboard. Now, because it is water based, and water is dense, whatever you’re hanging from make sure it holds at least three times the amount that you’re feeling. For example, it’s 35 pounds, it should be able to hold at least 100 pounds.If you’re looking for a bag that you’re gonna pound away on and put everything you want into it get the next size up. If looking for a bag that you could move, hit and slip this is the perfect bag. They do make a smaller head hunter 9 inch or 12 lbs. It’s pointless. Get a slip bag for half the cost or just make one for $10.Oh, make sure you use boxing gloves. Just because it’s water and rubber on the outside does not mean you won’t get hurt.If I had my personal choice and I had to chose between 3 bags to have. This is a must. And then either a wrecking ball bag or angle bag. Both have major benefits so really all 3 bags but who has thar money… Lol.Have fun and work they footwork