You can safely play with confidence. ■ SG Mark Passed Product (Personal liability guaranteed) 【Heat Protection Structure】Heat protection structure uses insulation between the main body and the interior material to reduce the temperature of the interior parts that come in contact with the scalp by about 3 degrees Celsius. (*Results are based on performance evaluations based on the Mizuno method, and the effect may vary depending on the environment used. Denatured ABS resin, made in China, (Japan) Certified by the Japan Softball Association for 1 and 2 types; BRAND: MIZUNO (Mizuno); Product Number: 1DJHS111; Product Name: General use softball binaural hitters heat protection structure; Color: 01 (white) 09 (black) 14 (navy) 16 (pastel navy) 2 (blue) (red); Size S: 53-55 Size M: 21.7 - 22.4 inches (55 - 57 cm); Size L: 22.4 - 23.2 inches (57 - 59 cm); Size O: 23.2 - 24.8 inches (59 - 61 cm); XO (24.0 - 24.8 inches (61 - 63 cm). *2 cm). *When the surface of the dead ball is used, Also, please do not use a helmet that has a big impact even if you cannot see any damage to its appearance. The color of the product photos may differ slightly from the actual product depending on the operating system, browser, display, etc. Please be aware of this before purchasing.