F500 FIFA Basic Hybrid Soccer Ball Size 4

Outercover: 100.0% Polyurethane ; Bladder: 100.0% Butadiene Rubber ; Foam: 100.0% Ethylene Vinyl Acetate ; Backing: 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.

This ball weighs between 12.3 oz and 13.8 oz (size 4) and complies with official FIFA standards.FIFA Basic approved.

This ball measures between 25” and 26” (size 4) 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 43.3” and 63” 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%.

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Compliant with international soccer federations' most stringent standards. Certified to FIFA Basic standards

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

Imported

California Prop65 WARNING: This product can expose you to chemicals including Antimony Trioxide, which is known by the State of California to cause cancer. For more information, go to www.P65warnings.ca.gov.