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!
Strap colours may differ from those pictured here
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.
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.
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.
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.
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 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.
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.
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.
Spacer buckles take up any play between your boots and Flexi sidewalls. Easy to install, simply release the tail of the strap from the upper cam slot, attach the spacer buckle and re-engage the tail. You don't need to use all four buckles per binding, just engage buckles as required. Spacer kits are available free of charge on request.
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
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