A padel ball is a pressurised object. Almost everything about how it behaves, and how long it behaves that way, follows from that.
The clock starts when the can opens
Balls hold their bounce while the can is sealed, because the pressure inside the can matches the pressure inside the ball. From the moment it is opened, the ball begins losing gas through its own wall — not from the first hit, but from the first minute.
This is why a can that has sat open in a bag for a month plays flat even though the balls look new, and why a sealed can bought a year ago does not.
Tournament and training
Two grades cover most of the market.
Tournament balls are pressurised higher. They bounce faster and livelier, and they go dead sooner for the same reason — there is more pressure to lose.
Training balls hold pressure longer and bounce a little lower for it. Where a can lasting matters more than a fast bounce, they are the sensible choice, and it is why clubs buy them by the box.
Buying by the box
Boxes of twenty-four are the standard bulk format. The per-can price falls, and since sealed cans hold their pressure the format keeps — a box is not a commitment to play through it quickly.
Pressurisers
A pressuriser is a sealed container that holds opened balls at playing pressure between sessions. It addresses exactly the problem above: it stops a half-used can from going flat in a bag. It cannot restore a ball that has already gone soft — it holds pressure, it does not add it back.
What wears besides pressure
The felt goes too, and on sand-dressed courts it goes faster because the ball picks up grit on every bounce. A ball can hold pressure and still be finished.
Telling a dead ball
Drop it from shoulder height next to a new one from the same brand. A ball that has lost its pressure returns noticeably lower, and the gap is obvious once the two are side by side in a way it never is with a single ball in the hand. The sound differs too: a flat ball lands dull where a fresh one is sharp.
Open one can at a time
Since the clock starts at opening rather than at first use, three cans opened together age together whether or not they are played. A box lasts longest when it is treated as sealed storage and opened one can at a time.
Heat and cold
Pressure inside a ball responds to temperature. Balls left somewhere cold play slower and lower until they warm up, and balls stored somewhere hot lose gas faster over time. Neither effect is dramatic over an afternoon; both matter over a season, and a bag left in a car sees the extremes of both.
What this catalogue records
The format and, where the maker publishes it, the grade — tournament or training — and the pack size. Bounce height, pressure in bar, and durability in hours are not published for these products and are not estimated here.