Connelly Sync Water Ski Binding - RearPatent pending Free Flex technology has erased the restrictions traditional baseplates put on a ski. Each boot is set in a supportive yet flexible Exolast and is mounted with our Dual Plate design. Where solid metal baseplates create dead spots, Sync boots allow your ski to flex and move as it was intended. Through the middle of a turn the Exolast support flexes with the ski ever so slightly, unnoticeable in the boot but very noticeable in the