A large part of the helmet is made from recycled EPS materials with 20% cork AVID Progressive EPS - A mix of different density EPS ensures that both strong and light impacts are optimally absorbed. At the same time, the material remains light and allows for the best possible ventilation In-mold shell construction Clear visor Click-to-Fit system - Height-adjustable adjustment system Webbing and padding - 100% recycled polyester Ventilation - 13 vents ensure optimal ventilation Weight: 380 g (size M) Type Article Area of use City / Trekking Color name dark bronze Gender Adults Main color brown Head circumference 52 cm , 53 cm , 54 cm , 55 cm Head circumference up to 55 cm Head circumference from 52 cm Closure system Plug closure Adjustment system Click-to-Fit Visor fixed