Flexi NP Polar Ski Bindings

Flexi Ski Bindings

The original Flexi

Flexi NP was invented to combat the alarming failure rate amongst boot and binding combinations on polar ski expeditions. In 2002 the Flexi prototype went all the way from the Siberian coast to the North Pole, without failure, and spawned this original Flexi. Named after the North Pole, it had to withstand the worst the Arctic ice can offer. NP does that, and more!

  • Single-hand operation
  • Suits medium-width boots
  • Multi-Shim counters ankle roll
  • Unaffected by extreme cold
  • Heel locators provide torsional rigidity

Strap colours may differ from those pictured here

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​Base Plate

Each base plate is cut from a single sheet of 6mm polyethylene - strength and flex are unaffected by the coldest temperatures on Earth and we back it with our lifetime warranty. The narrow flex stem, a key component of Flexi's base plate, provides flex that mimics the fore and aft rocker of your boot, facilitating a comfortable, natural and economical ski stride. The broader base provides torsional stiffness that, together with the heel locators, both eliminates binding side-slip and maximises edging. Hydrophobic plastic and large drainage holes eliminate ice and snow build-up. The arrow hole points to the outside of the binding indicating left and right.

NOTE: NP's base plate is characterised by a circular rear drainage hole.

Flexi NP Ski Bindings-base

​Boot Cage

The boot cage houses your boot onto the base plate. Laser cut from marine-grade aluminium, the cage is married to the base plate using a combination of high-grade stainless steel and aluminium rivets, forming the core of Flexi's functionality. Once combined, Flexi becomes torsionally rigid under the arch and heel of the boot yet flexible across the flex stem, in effect a simile of your boot sole.

Flexi Ski Bindings Boot Cage

Straps and Buckles

The reinforced strap system, made from premium-grade 25mm webbing, is attached to Flexi's side-walls via double cam-slots. Once cammed in they never move. Step into Flexi, pull the oversized tensioning strap to secure the boot and you're away. One hand, one easy action! The straps automatically adjust to any boot size, with additional adjustment at the cam-slots for super-size. To exit, place the tip of your ski pole through the release loop and push with the basket. Free in seconds without bending over. After a few uses the straps retain a memory of your boot shape. Fitted with high-quality acetal buckles for cold tolerance.

Flexi Np And Oversize Straps

Cam Slots

No tools are required to fine-tune, remove or replace Flexi's straps, a big advantage when making field adjustments or repairs. Serrated cam slots in the side walls secure the straps and ensure they never slip. Yet, to make additional adjustments to volume, the straps loosen easily, even with mitted hands at forty below.

Flexi Ski Bindings Cam Slots

Heel Locators

The combined base plate and boot cage stiffness provides adequate torsional rigidity under normal skiing conditions. To facilitate maximum ski edging on steep ice, Flexi incorporates a unique heel locator system. Two lugs on the underside of Flexi's base plate locate either side of a 14mm heel plate mounted to the ski. Heel slip is entirely eliminated, even under the most extreme edge loading, keeping your boot firmly and squarely on top of the ski...where it should be!

Flexi Np And Oversize Heel Locators

​Mounting Plate

Flexi is secured to the ski using a 2.5mm anodised aluminium mounting plate and four Posi-Drive screws. The stress placed on a binding is maximised during severe edging, yet the mounting plate, together with the heel locators, equalises the load across the entire base plate, reducing stress to a minimum.

Flexi Ski Bindings Mounting Plate


Pronation and supination are anatomical conditions that cause excessive inward or outward rolling of one or both feet. Pronation (outward roll) in particular is a relatively common condition. A symptom while skiing is a tendency for the ski to rotate onto the inside (or outside) edge, particularly skis with a narrow waist (50mm or less). This can be extremely debilitating during long ski trips and it is important to set the foot in a neutral or flat ski position. To accommodate this, Icetrek has designed the Multi-Shim, a plate with multiple mounting hole patterns that is fixed to the ski and onto which the binding is mounted. Skiers can offset mount for moderate or severe pronation or supination. You can also mount forward or back of the balance chord. And don't worry if you need to re-position on the Multi-Shim, you can readjust as often as you like, perfect for rental situations.

Flexi Ski Bindings Multi Shim

Heel Plate and Heel Shim

The heel shim serves the same function as the multi-shim, allowing the heel plate to be offset by the same factor as the binding. The heel shim mounts permanently to the ski and the heel plate screws to the shim. For Flexi NP the heel plate is mounted with its long axis parallel to the ski.

Flexi Np And Oversize Heel Plate

Bolster Kit

Bolsters take up any play between your boots and Flexi sidewalls. Easy to install, simply release the straps in the cam slots, insert the bolster and re-engage the straps. You don't need to use both bolsters per binding, just use as required. Bolster kits are available as accessories, click on Parts above.

Icetrek Flexi Bolster

Weight: 998g / 34oz (including multi-shims, heel plates, mounting plates, straps and fasteners)

Shipping weight: 1.3kg / 46oz

Base Plate: 6mm polyethylene

Boot Cage: aluminium

Mounting Plate: aluminium, anodised

Multi-Shim: polyethylene

Heel Plate: 14mm polyethylene

Heel Shim: 6mm polyethylene

Straps: high-grade 25mm webbing

Buckles: high-grade nylon

Minimum ski waist width required: 45mm

Made in: Australia

Flexi Multi-Shim

Parts & Accessories

Flexi Mounting Plate

Parts & Accessories

Flexi Heel Plate

Parts & Accessories

Flexi Heel Shim

Parts & Accessories

Flexi Shim and Heel Set

Parts & Accessories

Flexi NP/Oversize Replacement Straps

Parts & Accessories

Flexi NP/Oversize Bolster Kit

Parts & Accessories

Flexi NP/Oversize Mounting Screws - 15mm

Parts & Accessories

Flexi NP/Oversize Mounting Screws - 21.5mm

Parts & Accessories