Golf Ball Compression and Layers, Explained
Compression rates how firm a golf ball is; low suits slower swings, high suits faster ones, and the cover and layers decide spin and feel near the green.
By Adolph GreenContributing writer.
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The short answer
Golf ball compression is a rating of how firm the ball is, or how much it squashes when the club hits it. A higher number means a firmer ball. Bridgestone's ball fitting guide puts the rule simply: faster swings need a higher compression ball to get the most distance, and its lower compression models are made for slower swing speeds.
The layers decide the rest. The core drives ball speed on full shots, and the cover matters most for spin on irons, wedges and chips.
Compression numbers from one maker
Ratings are set by each brand, so compare numbers within one brand's lineup rather than across brands. Srixon publishes these on its product pages:
| Ball | Construction | Cover | Compression | Srixon's feel label |
|---|---|---|---|---|
| Z-STAR XV | 3-piece | Urethane | 102 | Soft |
| Z-STAR | 3-piece | Urethane | 88 | Softer |
| Q-STAR TOUR | 3-piece | Urethane | 74 | Softer |
| SOFT FEEL | 2-piece | Ionomer | 58 | Softer |
Srixon describes the Z-STAR XV as its maximum distance ball and the Z-STAR as its maximum greenside spin ball, and says the Q-STAR TOUR uses a lower compression rating for a softer feel and longer, straighter shots with low-lofted clubs.
What each layer does
In an interview with National Club Golfer (updated in 2024), Srixon's head of research and development explained the layers:
- Core: the largest part. It has the biggest effect on ball speed on full shots and mostly sets the compression, through its size and firmness.
- Mid layer (mantle): backs up a soft cover so it can grip the club face on short shots, and works with the core for speed on full swings.
- Cover: touches the club face, so it controls spin on approach shots and much of the feel on putts.
2-piece vs 3-piece golf balls
A 2-piece ball is a core plus a cover. According to the same interview, most 2-piece balls are made with lower compression because they target golfers with average swing speeds, and almost none use the soft urethane cover found on tour balls. Nearly all 3-piece and 4-piece balls do use urethane.
That matters around the green: the interview notes that without a urethane cover it is hard to spin the ball back on approach shots. The SOFT FEEL in the table is an example of the other route, a 2-piece ball with an ionomer cover and a low compression rating. Durability, the same source adds, depends mainly on the cover rather than the number of layers.
How much compression changes your drive
In Srixon's driver testing described in that interview, switching between high and low compression balls moved ball speed by 2 to 3 mph, launch angle by about 1 degree and backspin by 400 to 500 rpm. That is real but modest, which is why the interview suggests trying different balls instead of assuming the firmest, priciest ball is right.
Which one fits you
- Slower swing, wants distance and a soft feel: a low compression 2-piece ball.
- Average swing, wants more short game spin: a mid compression 3-piece urethane ball.
- Fast swing: a high compression tour ball.
A ball fitting or a few sleeves of different models on the course is the surest test. Golf balls sit in the sports and outdoors department.
How we count
The chart uses the compression ratings Srixon prints on its own product pages. Other brands use their own scales and some do not publish a number.