Easton EC70 ISA SeatpostEaston EC70 ISA Seatpost The newly redesigned EC70 Seatpost takes Easton's superlight unidirectional carbon and applies their patent pending ISA technology Independent Saddle Adjustment which allows for completely independent fore aft adjustment and saddle adjustment. With the 2 pitch adjustment bolts, the saddle angle gets locked into place as if you were adjusting limit screws, and unlike single bolt designs, you get adjustability and security.