What Is a Golf Ball Made Of? Core, Casing and Cover

Core. Titleist's core explanation identifies polybutadiene, a synthetic rubber, as the main material in the core it describes. A core is a formulated mixture, not a claim that the whole ball is one pure material.

Casing. Its casing-layer explanation describes an ionomer thermoplastic layer around the core and below a urethane cover. Its formulation and thickness are design choices. Not every ball needs a separate casing: the maker also explains that an ionomer cover can provide the core-protection role in a different construction.

Cover. The cover is the ball's outer playing surface. The named Pro V1 and Pro V1x product pages describe cast urethane elastomer covers. Their paint, markings and finish should not be confused with a structural casing layer.

The current Pro V1 page names a core, high-flex casing and cast urethane cover. The Pro V1x page specifically describes a dual core alongside casing and cover. The extra core region changes what is labelled in the drawing; it does not authorize a claim that more regions are automatically better for every golfer.

A diagram cannot measure a player's carry distance, wedge response or durability. Nor can a piece count tell you how a particular ball will feel off your putter. Manufacturing design and an individual's playing result are different questions.

Read a maker's performance claims as the maker's claims. The table above records published construction without turning advertised spin or distance benefits into our own test result.

Titleist's Ball Plant 3 overview follows core mixing and molding, casing, cover and finishing. That order helps distinguish the structural ball from the appearance of its surface. It is a manufacturer's account of its process, not a home-manufacturing recipe.

For used balls, that distinction becomes practical: cleaning an existing surface and applying a new coating are separate treatments. The recycled-versus-refinished guide compares what sellers say they do. For choosing an item to play, begin with your own needs and observed results rather than buying a layer count.