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We introduced Sinch to take up the slack between our Vintro and Paramark bindings, offering extreme-cold touring functionality with ease-of-use ladder straps and ratchet buckles. Tested on multiple polar outings, we back the durability on all but sustained North Pole expeditions. Each pair comes with a pair of short, medium and long ladder straps to accommodate any size boot.
Available in regular and wide. How to choose.
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.
Weight: 1450g / 51oz (including multi-shims, heel plates, mounting plates, cuffs, straps, buckles and fasteners)
Shipping weight: 1.75kg / 62oz
Base Plate: 6mm polyethylene
Boot Cage: aluminium
Mounting Plate: aluminium, anodised
Heel Plate: 14mm polyethylene
Heel Shim: 6mm polyethylene
Ladder straps: Hytrel, 15, 25 and 30cm
Ratchet buckles: high-grade Taiwanese-made
Minimum ski waist width required: 45mm
Made in: Australia