<!--ProdInc[170090662]/Mall:[rei_US]--> Integrated skeletal structure creates a roll cage for added strength and impact protection; VaporFit adjustable system provides a comfortable fit Koroyd is featured in strategic, zonal impact areas offering increased protection where it matters most Mips safety system features a low-friction layer inside the helmet that allows a multidirectional movement of 10?15 mm on certain angled impacts Mips is intended to help reduce rotational force to the head Pass-through channels allow eyewear to be easily stored on the front of the helmet while the AirEvac system works to pull air off of your eyewear to prevent fogging 15 fixed vents for consistent airflow Ionic+ antimicrobial lining offers sweat-activated odor control Helmet is light-mount compatible CPSC and CE EN-1078 certifiedTo find your size, position a tape measure just above your ears and about 1 in. above your eyebrows. Keep the tape level to measure the circumference around the largest part of your head and then find the corresponding size in the Technical specs info. View all Smith Road Bike Helmets Technical Specs Item #241644Best UseRoad Cycling Technical specs <table border=1 cellpadding=5 style=''border-collapse: collapse;''><!--[--><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Best Use</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Road Cycling</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Helmet Style</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__ <img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=rei&ProdInc=170090662&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px''>