The Mavic Ksyrium Pro MIPS Helmet brings together a great retention system and excellent ventilation so you can enjoy your longest rides. The Live Fit Technology uses XRD foam integrated with Multi-Directional Impact Protection System, or MIPS Technology. The Ergo Hold SL Retention System is adjustable for optimal comfort. The Kysrium Pro Pad is shaped specifically to distribute the weight evenly and allow it to float with you. The 37.5 Fabric in the padding wicks 5 times faster than traditional fabric and attract humidity vapor to help prevent overheating. There are 22 Climba Vents as well to provide ventilation as you ride. Sizing: Medium 21 ¼-23 1/4,’’Details: