Flexi SINCH Polar Ski Binding

Sinch is built on Flexi's Ultima System, a revolutionary concept in ski touring bindings. Click here for a full range of Ultima System features.

High-quality ratchet buckles are riveted to two 25mm webbing straps that attach to cam slots on the boot cage wall. The no-tool straps allow for fast and easy adjustment to your boot bulk. 

During our ladder strap R&D, we froze multiple materials down to -40c in an industrial test freezer and placed them under severe load; only DuPont Hytrel came out unscathed. We then field tested Hytrel on expeditions across Greenland and to both poles, a combined 1300km and 65 days, and it came up trumps. Attached by 304 stainless bolts, washers and Genloch nuts, we provide 3 sizes of ladder strap per pair allowing you to chop and change depending on your boot. Each ladder strap has a lug on the end to keep it retained in the buckle making boot entry and sinching, well...a sinch!

Although Flexi Sinch comes in two widths, optional Bolsters take up any remaining play you may still have between your boots and sidewalls. Easy to install, simply release the straps in the cam slots, insert the bolster and re-engage the straps.