Ski Boot Sole & Binding Changes: What You Need to Know in 2025
The ski gear game has changed, especially when it comes to boot soles and binding compatibility. If you've upgraded your boots or bindings in recent years—or are planning to—here’s what you need to know to stay safe and perform your best on the slopes.
What’s Changing
Modern ski boots are built for versatility. Many now feature rubberised soles, rockered shapes, and lightweight materials that support both alpine skiing and backcountry touring. These crossover designs boost comfort and mobility—but they can also introduce compatibility issues with older binding systems.
Types of Ski Boot Soles
The industry has shifted toward clearer standards. The main types of boot soles are:
- Alpine (ISO 5355) – Traditional flat plastic soles compatible with standard alpine bindings.
- GripWalk (ISO 23223) – Now the dominant hybrid option, offering better traction and walkability while being compatible with most modern bindings.
- Touring (ISO 9523) – Flexible, full-rubber soles designed for pin/tech bindings and alpine touring setups.
- WTR (Walk-To-Ride) – Largely phased out by major brands, though you may still encounter older models in circulation.
Binding Compatibility & Safety
Bindings are engineered to release at the right time to prevent injury. But if your boot sole doesn't match your binding, the Anti-Friction Device (AFD) may not function correctly—compromising both safety and performance.
- MultiNorm Compatible (MNC) bindings are the safest and most adaptable choice. These can accommodate Alpine, GripWalk, and Touring soles safely.
- Leading models like the Marker Griffon X and Salomon Strive 16 MN have improved toe pieces and lower stack heights for better skiing dynamics.
How to Check Your Setup
- Look at the sole: Labels like GripWalk or ISO 5355 are typically printed near the toe or heel.
- Check your bindings for markings like MNC, GripWalk compatible, or ISO certifications.
- Not sure? Bring your gear into Snow Central for a safety check.
Quick Tip
Boots from brands like Salomon, Head, Lange, and Rossignol often come with GripWalk soles by default in recent seasons. Always double-check the underside of your boots and consult the manual for exact compatibility.
