CenturyWavemaster XXL | Freestanding Punching Bag with Base | Heavy Bag Boxing Martial Arts Kickboxing Bag | Optimal Strength and Cardio Training Bag

I'm only writing this review because it seems like neither the reviews nor the manual do a good job of illustrating to people the difference between water and sand when it comes to filling the base.The base has a capacity of about 33 gallons. A gallon of water weighs about 8.3 lbs and a gallon of dry standard sand weighs about 13 lbs. Sand is a little more than 1.5x as heavy as water per volume. Going with sand allows you to put more weight in the base per volume.Also water, as a liquid, is going to carry force throughout the water meaning when you hit the bag it will generate waves in the water within the base. Sand on the other hand is solid and will deaden the force not allowing it to carry throughout the sand in the base nearly as much. Sand does a better job of reducing the force that acts on the base from hits the bag takes, meaning it is even less likely to slide around.I'm 6'3 220lbs and I put 250lbs of sand in this base (which is a little under 60% full) and it stands on a concrete floor so there's not a ton of friction and I can open up on this bag without it moving very much at all. The bag height is perfect for my height I would say at about 6'6 this bag may start to be a bit short for you, but everyone around or under my height will probably enjoy this size bag. If you want there to be absolutely zero movement you can grab a thin rubber mat, like what you would place under an elliptical machine, which will adhere great to most smooth surfaces (i.e. concrete, tile, hardwood, etc.) and that should solve most of your issues.If you do decide to go with sand be sure to grab a funnel at Home Depot or where ever you buy your sand at, it'll make filling the base way easier. The manual will tell you to use the bag as a lever to help you distribute the sand within the base, I'd say skip that and just replace the lid, grab the base on the side with the opening and lift with your legs to re-distribute the sand between each 50lb bag.TL;DR: Good product & if you want a more sturdy base fill it with sand instead of water, especially if you're a guy and you don't want to have to pull your punches. If you're reading these reviews and you're worried about stability don't be, disregard people who filled the base with water and have complaints about movement so long as you're comfortable filling yours with sand you will get a far better result.

Love this bag. Super nice quality, easy to assemble. And holds up well to kicks/punches. You can fill the base to desired weight so it’s sturdy but also not overly heavy if you need to move it. Base is shaped like a tire so I filled it and then rolled it to were I wanted it. I put water in originally but poured that out for sand since I’m in Minnesota and didn’t want the water to feeze and crack the base. But overall it’s a super nice bag and seems to be holding up really well to regular use.

I bought the Century Wavemaster XXL after looking at a number of hanging and freestanding bags. The cost was daunting at first, but I'm glad I didn't cut corners. It's nice as a freestanding bag since I don't have to worry about the metal bars of a stand when I do roundhouse kicks. It's also nice to be able to move around the bag as I work it. The bag itself is a breeze to assemble and it holds up well to punches and kicks. There is some movement from it on the floor but that's true of all freestanding bags. Personally, I consider that more a feature than a flaw.The thing I like most about this bag that I did consider when buying is the thickness of it. It's wide and that makes a difference when working on it. It feels more like a target and it just feels really substantial when hitting it. It's broader across than the hanging bag I have in my garage, and although the hanging bag is denser in material than this Wavemaster, the extra width is appreciated and has made this my go-to when working out.

This is a good product and it enables me to do some bag work at home, so I can't complain TOO much. However, I will say that the base design is not ideal. The product calls for water or sand to fill the base, and having spoken with some other XXL owners, I was told in unequivocal terms, do NOT fill the base with sand if you ever want to move this thing again. So, given that I won't be living in my current house forever, I chose to fill the base with water.Don't get me wrong, water does the trick for the most part, but it's not great. Even if you fill the base to the brim with water, the water will slosh around when you throw big strikes and the sloshing + strike impact actually moves the base and heavy bag a little bit each time. I was hoping the bag wouldn't move at all, but again, since I can't hang anything from my ceiling in the basement and I didn't want to bother mounting something like this to the wall, this was my only option.The bag itself is pretty sturdy, though mine came with "stretch marks" (only way I can describe it) across the logo. I bought the red one, in case you're curious.Bottom line, good product, amazing that I can do bag work at home, could've been better if they put a little more thought and testing into development of the base and how to keep it completely stationary.