The Phaenom FS 01 100 is built for skiers who want intuitive flex, smooth power delivery, and all-day comfort without giving up performance. Tuned slightly softer than its 120-flex sibling, this all-mountain freeski boot delivers a more forgiving, playful ride while maintaining the precision and control needed to ski confidently across the entire resort—and beyond the ropes.
Its defining feature is the hybrid cabrio / overlap construction, a thoughtfully engineered blend that pairs the anatomical fit and edge control of an overlap boot with the progressive, shock-absorbing flex of a 3-piece design. This creates a flex pattern that ramps up naturally, absorbs impacts with ease, and stays predictable through turns, landings, and variable snow.
Comfort and sustainability are baked into every detail. The patent-pending Phaenom Strap uses a single recyclable material to deliver elastic rebound, vibration damping, and refined flex control—translating skier input into smooth, efficient energy. Underfoot, a shock-absorbing sole filters high- and low-frequency vibrations to reduce fatigue and soften landings. Finished in a purposeful all-black design, every component is designed to be repairable, reusable, and recyclable—clean in look and thoughtful in construction.
100 Flex Rating – Smooth, approachable flex ideal for all-mountain freeskiing
Hybrid Cabrio / Overlap Design – Progressive flex with precise edge control
Patent-Pending Phaenom Strap – Elastic rebound, shock absorption, and flex control from a single recyclable material
Shock-Absorbing Sole – Reduces vibration and foot fatigue while improving landing comfort
102 mm Last – Balanced fit that blends performance and comfort
Two-Buckle Layout – Clean, simple design with efficient adjustability
All-Black Construction – Built for longevity, repairability, and recyclability
ISO 23223 Soles – Compatible with modern alpine binding standards
Category: All-Mountain Freeski Boot
Flex: 100
Last: 102 mm
Shell Weight: 1550 g
Liner Weight: 550 g
Sole Standard: ISO 23223
Construction: Hybrid Cabrio / Overlap
Color: Black
Ski boots are sized in Mondopoint, based on the length of your foot in centimeters. The chart below is a general reference for converting between sizing systems.
This chart is not a fitting. The only way to know your ski boot size is to be fit in person, either with a Boot Fitting at our shop or from a professional fitting you have had elsewhere. Sizing, shape, and volume vary by brand and model, and a performance fit is snugger than your street shoe. Unworn boots can be returned under our return policy, but a boot that doesn't fit can be a big hassle for your trip if you haven't tried it on.
| Mondo (cm) | US Men's | US Women's | EU |
|---|---|---|---|
| 22/22.5 | 4/4.5 | 5/5.5 | 35 |
| 23/23.5 | 5/5.5 | 6/6.5 | 36/37 |
| 24/24.5 | 6/6.5 | 7/7.5 | 38 |
| 25/25.5 | 7/7.5 | 8/8.5 | 39/40 |
| 26/26.5 | 8/8.5 | 9/9.5 | 41 |
| 27/27.5 | 9/9.5 | 10/10.5 | 42/43 |
| 28/28.5 | 10/10.5 | 11/11.5 | 44 |
| 29/29.5 | 11/11.5 | – | 45/46 |
| 30/30.5 | 12/12.5 | – | 47 |
| 31/31.5 | 13/13.5 | – | 48/49 |
| 32/32.5 | 14/14.5 | – | 50 |
Conversions are approximate and can differ by half a size between brands.
Ski boots are built with one shell for each full and half size, so a 27 and a 27.5 are the same boot with a different liner or footboard. That is why sizes are listed together, like 27/27.5.
Very few models differ from this. Scarpa is the main exception, pairing sizes the other way (for example, 26.5/27 share a shell). When a model is sized differently, we call it out on that product's page.
Book a Boot Fitting with our team at (802) 253-4531. Preliminary boot work is included with every boot purchase.
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