F550 FIFA Basic Hybrid Soccer Ball Size 5

Outer shell: 100.0% Polyurethane ; Bladder: 70.0% Latex Natural Rubber, 30.0% Isobutylene Butyl Isoprene Rubber ; Inner fabric: 100.0% Polyester

Our design team created this hybrid ball after observing soccer players in action on the field.This ball is a hybrid because its design combines the comfort of a machine-stitched ball with the durability of a hand-sewn one.We also used a bladder with a special design (1.25 miles of thread is wrapped around the bladder) to ensure lasting inflation and better sphericity.

We know that a stable trajectory is important, especially for field players kicking long balls and for goalkeepers sending the ball down the field. To ensure very good stability, we have changed the construction of the outer layer. Traditionally designed using 32 panels, we've designed the F550 using 24 identical panels. This improves the stability of the ball and makes it more comfortable to play with.

This ball weighs between 14.5 oz and 15.9 oz (size 5) and complies with official FIFA standards.FIFA Basic approved.

This ball measures between 26.8” and 27.6” and complies with official FIFA standards.FIFA Basic approved.

Here's how we test sphericity:Average measured variation: 1.8% max (FIFA Basic certification).We measure the soccer's sphericity at 4,500 different points and then examine any differences. If the discrepancy is greater than 1.8% (FIFA Basic Standard), our engineers are tasked with improving the sphericity to ensure a consistent bounce.

Here's how we test pressure loss: We inflate the ball to the recommended pressure (meaning 0.8 bar).72 hours later, the ball must not have lost more than 15% of its pressure, meaning approx. 0.1 bar (FIFA Basic certification). 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.

Here's how we test water absorption:We simulate rainy playing conditions in a lab, leaving the ball to sit in 0.8” of water on a pivoting support while subjecting it to 250 compressions.At the end of the test, the ball must have absorbed no more than 10% of its weight (FIFA Basic certification).

Here's the bounce test: The ball is dropped onto a steel plate 10 times from a height of 6'7”. The bounce height must be between 49.2” and 61” with a maximum difference of 3.9” between the ball's highest and lowest bounce.

The most stringent test we put this ball through is the shooting machine test.The ball must withstand 2,500 shots against an inclined concrete surface at 30 mph from a distance of 8'2”.At the end of the test, we check:- the ball's general state: Stitching must withstand this test- the circumference: Must not have increased by more than 0.6”. - the sphericity: It must not have varied by over 1.8%- the pressure: loss of pressure must not exceed 12.5%.

Compliant with international soccer federations' most stringent standards. Tested in use by a group of 20 intermediate players. The results from the new design are very good. The ball has a more stable trajectory compared to a ball with 32 panels.The F550 also meets all FIFA standards and can be used in official matches. Certified to FIFA Basic standards

After use, store your ball in a dry and ventilated place.

Imported