The new KF-R500F foot stretcher is fully composed out of prepreg carbon. The KPR500F binding system is recessed in to the foot stretcher to ensure no loss of cockpit space and even fitt the tallest athletes with issue. The release system is operated by pulling on the release cords. This system is fully approved by FISA and does not require for any heel ties/ropes attaching the shoes to the stretcher. Both the outside and the core material of the stretcher consist of high quality carbon fibre making it extremely rigid which reduces a loss of power.