The FF5 is designed for maximum comfort during long and intense exercise. Featuring fabric electrodes integrated into the belt, FF5 is our softest, lightest and most comfortable chest strap available. Designed to meet the demands of ultra-cyclists who requested the softest and most comfortable chest belt they could wear all day without any drops in connection. The low friction fabric electrodes have a larger surface area in contact with the skin, improving connectivity and reducing skin irritation. FF5 is a one size fits all using vertical stitching giving increased flexibility that can adjust to a wide range of chest sizes.
 
The snap on connection poppers are a compatible with most popular hear rate transmitter prods including: Cardiosport TP3, TP5, Wahoo TICKR, TICKR RUN, TICKR X, Sigma R1, Peloton, Stages, SRM, BKOOL and Geonaute.