1Storm Dual Sport Motorcycle Motocross Off Road Full Face Helmet Dual Visor Matt Black, Size Medium (55-56 CM 21.7/22.0 Inch) Black / Gray and there is an instruction

and there is an instruction at point 3 of the manual

25 Inches total depth

* Extra Care is made with 30 billion live cultures from 12 different Bifidobacteria and Lactobacilli strains to reflect your gut's natural diversity

and board control

Handling Power: 1500 Watts Peak

1Storm Dual Sport Motorcycle Motocross Off Road Full Face Helmet Dual Visor Matt Black, Size Medium (55-56 CM 21.7/22.0 Inch) Black / Gray and there is an instructionBrand: 1Storm Color: Dual matt Black Features: Advance Dual Sports and Dual Visor Design (Inner Smoked Visor and Outer Clear Shield); Light weight durable aerodynamic thermoplastic alloy shell; Heavily cushioned and comfortable interior, Removable and washable Beautiful glossy UV protective finish; DOT Approved Publisher: Power Gear Motorsports Details: Helmet Size Chart S 53 54 CM 20. 9 21. 3 Inch M 55 56 CM 21. 7 22. 0 Inch L 57 58 CM 22. 4 22. 8