JPHNAN Professional Size Durable Official Microfiber Synthetic Leather Butyl Waterproof Internal International Standard Compliant Volleyball, 5,

[Size 5 Competition Specs] Strictly meets the international standard size 5 (weight 260-280g / circumference 65-67cm) and optimal rebound pressure of 0.3-0.32kgf/cm² (4.26-4.62PSI). [Professional-grade durable design] Made with 1.6mm high-density microfiber synthetic leather (which has passed 10,000 abrasion tests) and a butyl bladder, these gloves offer 30% more air retention than conventional models, and can withstand the impacts of hard courts. [Precisely controlled surface processing] The 3D uneven surface (friction coefficient 0.65±0.02) reflects feedback from Japan national team players, ensuring reliable tosses and spikes even in sweaty and humid gymnasiums. [Accessory set for athletes] Includes an air pump and needle. The storage carton (21x22x21cm) allows for hygienic storage when transporting to the gym. A perfect gift. [365-Day Warranty] If any quality issues are found with the volleyball, we will provide a free replacement or full refund. We deliver the volleyball deflated to minimize the risk of damage. JPHNAN Volleyball Elite Series - Performance innovations that exceed the demands of top players ＜Designed specifically for the three major sports＞ ① Surface: 1.6mm thick microfiber water-repellent coating, suitable for everything from gym floors to beach sand ② Core: Stable even in tropical climates (32°C) with air pressure changes of within ±0.02kgf/cm² (manufactured in an ISO9001 certified factory) ③ Structure: 10-panel seamless joining technology prevents seam bulging ＜Competitive advantages proven by data＞ ✅ Precise weight management of 260-280g, ideal for adjusting serve speed ✅ Quiet design that is 5dB lower than conventional balls (to combat gymnasium echo) ✅ Capable of generating high-speed spin at 12 revolutions per second (tested in university athletic clubs) ＜Multi-situation functions＞ ・Outdoor practice in rainy weather: Water-repellent finish reduces surface water absorption by 73% ・Humidity control: Breathable mesh layer prevents condensation ・Hygiene management: Alcohol wipe OK (colorfastness tested) ＜Trusted by the competition field＞ Installed in over 50 high school volleyball clubs nationwide. *Operation confirmed by a JVA-certified referee. Set contents: ・Official match ball x 1 ・Air pump set Inquiries: 24-hour support in Japanese via Amazon message. Please feel free to contact us with any questions about adjusting the air pressure or storage tips.