Football Light Learning Ball Size 4 - Blue/Green/Purple

After carrying out multiple observations over a long period of time, our team designed this lighter ball while retaining all of the technical characteristics of a traditional football.The wound bladder (2 km of thread is wrapped around the bladder) ensures longer-lasting inflation and better sphericity.

This ball is considered light because it is about 15% lighter than a regular size 4 football. What difference does that make? Thanks to its weight, young football players can kick or head the ball more comfortably. It's also easier to aim, do long passes and score goals.A guaranteed hit!

The weight of this ball is between 280 g and 300 g compared with 350 g and 390 g for a traditional size 4 football.

This ball measures between 63.5 cm and 66.0 cm (size 4).

We measure the football's sphericity at 4500 different points and then examine any differences.If the discrepancy is greater than 1,8% (FIFA PRO Standard), our engineers are tasked with improving the sphericity to ensure a consistent bounce.

We inflate the ball to the recommended pressure (meaning 0.8 bar).72 hours later, the ball must not lose more than 15% of its pressure, meaning approx. 0.1 bar. The pressure after 72 hours must, therefore, be at approx. 0.7 bar.This also means that it is quite normal for a ball to lose pressure after a few days.

We simulate rainy playing conditions in a lab, leaving the ball to sit in 2 cm of water on a pivoting support whilst subjecting it to 250 compressions.By the end of the test, this ball must not have absorbed more than 15% of its weight, or approx. 43 g for size 4.

Between 115 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 2 metres in height.

The most demanding test that this ball is subjected to is the machine shot test.The ball must resist up to 2500 shots against an inclined flat concrete slab at 50 km/h at a distance of 2.5 m.At the end of the test, we check:- the ball's general state: the stitching must withstand this test.- the circumference: it must not have increased by more than 1.5 cm.- the sphericity: it must not have varied by more than 1.8%.- the pressure: loss of pressure must not exceed 12.5%.

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