Asics Pro Flame High Jump Spikes Built for the serious highjumper, this spike utilises a Sharkduo outsole along with an 11pin spike design for optimal traction. Along with a SyntheticLeather Upper and Lock Down Strap, your foot will surely be keptin place as you make your approach. Includes twenty-two 1/4""pyramid spikes with a spike wrench. The Synthetic Leather Upperminimises in-shoe movement, It secures the foot in a durableconstruction and to provides a form-fitting upper for theultimate in high-jumping performance. A Lock Down Strap islocated at the forefoot, this Velcro strap design helps tomaintain a secure fit and feel while a mesh tongue providesbreathability to the interior footbed. It also ensures superiorcomfort as the interior is cushioned to support the foot inplace. The midsole platform is formed from a Solyte compound.This responsive foam is an ultra light, top-of-the-line midsolethat delivers durable and responsive cushioning to the underfoot.It helps improve bounce-back characteristics and decreasesmidsole breakdown. The form of the shoes features Asicsasymmetrical sole design, which allows for an optimal take-offposition for right foot take off jumpers. Finally the outsoleutilises an 11 pin spike configuration allows for variabletraction patterns while the lightweight shark skin outsole hasbeen refined to minimise scuffs and scrapes. The SharkDuo is atextured thermoplastic unit for increased grip on various tracksurfaces.