Features: Reflective detailing for increased visibility Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older Technology: ROC LOC(R) CITY MIPS(R) fit system with plush padding and rubberized dial for adjustable feel 2-piece shell design featuring hard outer and polycarbonate, in-mold Hardbody(TM) lower with liner fused to lower shell for increased durability and minimal weight Wind Tunnel ventilation system to keep you cool MIPS(R) brain protection system integrated into adjustable fit system to reduce rotational forces and enhance comfort Specs: Weight: 360 g (size medium CPSC)/ 340 g (size medium CE)