Ultimate racing shoe with full PWRRUN HG foam midsole delivering unmatched energy return. Features aggressive carbon plate geometry and ultralight construction. Designed for elite runners seeking maximum performance in races from 5K to marathon. Unisex sizing with both Men's and Women's size equivalents (M3.5/W5.0 - M14.0/W15.5).
Sizing
Length: Most sources say it runs short; a half size up is the safer call for marathon distance, though some testers fit it true to size
Width and toebox: A narrow, low-volume toebox that tapers sharply, made tighter by a stiff toe bumper, restricting toe splay. Standard width only, and it is unisex sized, so women order well below their usual women's size.
Fit notes: Lockdown is good once laced despite a soft, flexible heel with no rigid counter, and volume is normal from the midfoot back. The stretchy integrated tongue needs careful lacing to avoid instep pressure. Do not run sockless because of the harsh toe guard.