The Bontrager Hilo Pro Carbon Triathlon Saddle is an ultra-fast saddle with a split support zone for all-out Time Trail & Triathlon efforts. The Hilo Pro is designed to provide symmetric & stable pedalling in multiple different positions so you can move around on the saddle without losing power. The short stubby nose on the saddle makes it easier to get into a tucked aero position while the split zone structure eliminates soft tissue pressure allowing you to stay in position for longer. To make the Hilo Pro comfy for longer distances the oversize carbon rails & a strategic dual-layer foam add in extra compliance & cushioning. The Hilo Pro is also compatible with Bontrager’s Speed Storage System so you can add bottle cages, tubes & inflators securely on the bike. Features Aerodynamic Posture 1 is the most forward pelvic rotation, common in triathlons Split support zone eliminates soft tissue pressure for a more powerful rotated position Saddle nose structure is designed for stable & symmetric pedaling Strategic dual layer foam provides soft top layer for comfort & firm base for support Oversized carbon rails & Channel Flex on bottom of shell for added compliance in Form Bio Dynamic products optimize your natural movement for sustained, higher performance Compatible with Speed Storage system to securely hold water bottles, tube, & inflator (sold separately) Requires oversize rail-compatible seatpost & seatpost ears