Patent pending Free Flex technology has erased the restrictions traditional base plates 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 base plates 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 reaction of your ski. The seamless outer shell is set with a removable liner and the dual lace system pulls your foot back into the ergonomically shaped heel pocket. There has never been a better connection between you and your ski.