Precise fit, exclusive for teenagers Standard size 4: 19cm in diameter, 320-360g in weight, designed for youth and children, in line with FIFA standards, to help improve skills. Low elasticity design: Some models are made of low elasticity material, which is suitable for beginners to practise ball control, passing and shooting, reducing the error rate and increasing self-confidence. High-quality material, durable and resistant Thickened PU outer skin: wear-resistant and tear-resistant, adapting to a variety of venues and extending service life. Precision machine sewing process: tight lines and waterproof, not easy to open the line, to ensure that the ball is rounded, stable flight trajectory. Butyl inner liner: excellent airtightness, long-lasting elasticity, clear feedback when kicking the ball, free control. Safe design, care for growth Soft and comfortable: the outer material does not hurt the skin and bones, suitable for long time practice, reducing the risk of sports injuries. Environmentally friendly and non-toxic: Passed the safety test, no odour, no harmful chemicals, to protect children's health. Portable and Practical, Practise Anywhere Lightweight and easy to carry: compact size, can be easily put into the backpack, suitable for outdoor, park, school and other scenes. BONUS ACCESSORIES: Some sets include ball needles, ball bags or portable pumps, ready to use right out of the box, saving effort.