Design
This certified FIFA Pro soccer ball was designed with seamless thermobonding technology for perfectly sphericity and total precision during shots. In addition, this technology ensures better waterproofing while training in the rain. A laminated latex bladder guarantees durable inflation and sphericity.
Exclusive build
We know that during a match, details can make the difference. The F900 ball is designed for stable trajectories, ensuring players and goalkeepers have the best chance of following it through the air. We tested different types of outer panelling and chose the one with the best results. This ball's embossed lines and 12-panel design is exclusive to Kipsta.
FIFA Pro quality test
We conduct numerous tests to provide soccer players with excellent accuracy while competing. Each test is outlined below.
Weight
Between 430 and 445 g in size 5
Circumference
Between 68.5 and 69.5 cm.
Sphericity
Average measured variation: Maximum 1.5%
We measure the ball's sphericity at 16 different points and assess recorded discrepancies.
If the discrepancy is greater than 1.5% (FIFA Pro Standard), our engineers work on improving the sphericity to ensure a consistent bounce.
Maximum pressure loss
We inflate the ball to the recommended pressure (11.6 psi).
The ball cannot lose more than 15% of its pressure over the next 72 hours, meaning a maximum pressure loss of 1.5 psi.The pressure after 72 hours must be approximately 10.1 psi.This also means that it's quite normal for a ball to lose pressure after a few days.
Water absorption
To simulate rainy playing conditions in a lab, we put the ball in 2 cm of water on a pivoting support and subject it to 250 compressions. By the end of the test, the ball must not have absorbed more than 15% of its weight. For the F900, that's 40 g. This is an advantage of thermobonded designs; water absorption is limited in comparison to other designs (machine-stitched, for example)
Bounce
Between 135 and 155 cm, with a maximum difference of 10 cm between the ball's highest and lowest bounce. Each ball is dropped 10 times on a steel plate from a height of 2 m. The bounce obtained with the F900 ball complies with FIFA Pro requirements.
Shape and pressure retention
The most demanding test this ball is subjected to is the machine shot test.
It has to withstand up to 2500 shots against an inclined concrete surface at 50 km/h from a distance of 2.5 m.
At the end of the test, we check:- The ball's general condition: Stitching must remain intact
- Circumference: it must not have increased by more than 1.5 cm
- the sphericity: Must not have varied by more than 1.5%.
- Air pressure: the ball's loss of pressure must not exceed 1.5 psi
