Shame on me for not reading more of the reviews before ordering this. It's just a rubber kick ball partially filled with sand. It is unstable, and the center of gravity shifts with the sand. And because it's not solid, it WILL break/burst. It mentions multiple times in the listing that it is a "slam" ball. But if you use it like one, it will break. It's not a slam ball. It's not a medicine ball. It's a kick ball half filled with sand. Don't be fooled. Save your money and buy an actual quality piece of equipment, and not a cheap look alike.

Item is exactly as described. Actually feels heavier than I expected so don't worry about it feeling too light.

Love it ! Great addition to my home gym.

I added the 50 lb to my collection of dead weight slam ball. All of them are J/fit, good quality.

Seems to be a quality product good construction and looks identical to the TRX slam ball and is easy to grip

Easy to grip, durable and solid addition to garage gym.

I am addicted to using this slam ball just about daily. This is the second one I have purchased from j/fit. I have a 40 lb and now this 30 lb (I'm a female so these are on the heavier side but I love the challenging work out). I use these for squat cleans to the shoulder, over the shoulder tosses (like a keg toss), planks/plank knees to elbows, slam ball step ups, plank jacks, squats, lunges, pushups, travelling pushups, thrusters, sit ups, and sometimes as an actual "slam ball." These are durable, keeping their round shape (haven't flattened out like other slam balls), and portable. These complete any gym and you will get a full body blast from using these. I highly recommend this brand due to the best price and quality combination.

Weight inside the ball shifts around. Makes it unbalanced.

Awesome tool. I use it as an alternative to sledgehammer training, since you either spend $300.00 on a "designer" rubber sledge hammer that slowly cracks away from wear and temperature changes; or you find a tire yard where they'll give you a used 200lbs tractor tire, which you'll have to clean out and find a place to store in conjunction with a 20lbs sledgehammer. Been hurling that thing into the ground full force onto smoothed concrete: no issues.

Due to the ball's size and weight distribution, the 30lb SB is akin to a stone, a power bomb useful for developing and maintaining physical conditioning. Light but heavy. This ball serves. I like it.

Excelente material, muy recomendable para hacer ejercicio, y llegó antes de lo esperado

Good grip like a tire.

Excelente compra la de esta pelota... muy buena calidad y bien hecha. No despide ningun olor y su tamanaño es bueno.