Softer construction changes impact
A foam ball deforms when it meets the floor. Compared with a firm inflated ball, that construction changes the character of the impact and rebound. Manufacturers use different foam formulations and internal structures, so a category label alone does not establish performance.
SKLZ describes dual-density PU foam in its Pro. In The Lab specifies PU foam. QBounce describes a foam core. Those are construction statements; they are not proof that one design is acoustically superior.
Sound and vibration are different concerns
A softer impact can sound less sharp in the same room, while vibration may still travel through the building. The room’s surfaces can also affect how sound reflects. We have not measured these effects for the catalog products.
Rebound still depends on the surface
Carpet, wood and tile do not behave identically. A ball that feels comfortable on one surface may return differently on another. Confirm the exact manufacturer guidance and avoid unstable mats or loose coverings.
Why identical size does not mean identical feel
Mass, foam density, shape recovery and surface texture can all affect a handling experience. Published circumference only describes one dimension. Compare mass separately and do not inflate an airless foam ball.
The practical question is whether the ball gives you a controlled, considerate session in your actual space. Use the comparison tool to inspect the documented differences.
Sources & further reading
Sources reviewed October 21, 2026. Product statements are manufacturer claims unless noted; we have not independently tested these balls.