Boot Compatibility – The Hy is compatible with most alpine skiing, ski mountaineering, and freeride boots. To ensure safe and high performance, the Anti Friction Device (AFD) slider on the toe piece must be adjusted with various sole types. To achieve this, ATK developed specific spacers that fit between the sliding section of the AFD and its underlying structure. These spacers ensure proper boot-to-binding contact while accounting for the sole's thickness.

Toe Elastic Travel – 18mm each side.

Heel Clamps – The heel clamps, inspired by the alpine system, offers a spectacular sense of control and precision.

Hy Brake System – The rear ski brake locks automatically when the heel piece is in walk mode. This means that when the real lever has been pushed fully forward the ski brake can be locked in position with a simple press of the rear paddle. When transitioning to ski mode, it seamlessly unlocks by pushing the rear lever backwards, ensuring hassle-free use.

Heel Elastic Travel – 7mm

Seamless Transitions – Switching between ascent and descent modes is effortless. Simply raise the toe arms for walking or rotate them forward and down for skiing. The intuitive design ensures reliable performance in all conditions with no needs for interchangeable parts.

Three Walking Modes | -18mm, +10mm, +34mm – For uphill efficiency, the Hy Free includes a unique “negative” walk mode that allows the boot heel to drop slightly below the toe level. This reduces strain and improves stride efficiency, especially for freeride boots with limited cuff mobility and during long flat approaches. The Hy also features two heel raisers for easier uphill progress, both activated with the pole.

Flat Skiing – In ski mode, the boot sits flat on the ski, eliminating the rear-front pin height differential typical of standard pin bindings. This design delivers an alpine-like feel and performance.

Boot Sole Length Adjustment – 25mm

Crampon Shim Included – Compatible with most ATK crampons

Made in Italy

We recommend a brake width equal to or at most 15 mm wider than the ski waist width.