ISO 23223:2025

Overview - ISO 23223:2025 (Alpine ski boots with improved walking soles)

ISO 23223:2025 defines the interface requirements, test methods and marking for alpine ski boots fitted with improved walking soles that are intended to work with alpine ski‑binding systems having attachments at the boot front and rear. The standard ensures that enhanced walkability (walking soles) does not compromise the proper release function of compatible alpine ski bindings. It applies to Mondopoint sizes 15.0 and larger for Type A (Adults) and Type C (Children) boots.

Key technical topics and requirements

• Scope and applicability
  • Interfaces between boot sole and alpine ski‑binding (front and rear).
  • Boots with improved walking soles designed not to affect binding release behavior.
• Dimensions and tolerances
  • Detailed toe and heel dimensional drawings and nominal dimensions (Figures 1–5, 11, 19, 22–23 referenced).
  • Gauge checks (Annex C) and measurement positions (in‑gauge and flat).
  • Sole length pair difference: ≤ 2 mm.
• Evenness and symmetry
  • Evenness preload and measurement procedure (standard atmosphere 23/50 per ISO 554).
  • Preloads: 100 N for Type A, 50 N for Type C.
  • Evenness tolerances: toe area difference ≤ 0.7 mm (Type A) / 0.6 mm (Type C); heel area ≤ 1.2 mm.
  • Symmetry about median plane: admissible deviation 1 mm.
• Design elements
  • Side walls, free spaces, bearing surfaces and low‑friction zone requirements.
  • Bearing surface geometry and recessed soft components for walking soles.
  • Interface features affecting mounting point, shell style and compatibility with pin/insert bindings.
• Marking and manufacturer information
  • Mandatory marking and user manual information (including allowance for digital information).
• Annexes
  • Annex A: Mondopoint sizing and marking.
  • Annex B: “2 degree” dimensional details.
  • Annex C: Normative test gauge for dimensional checks.

Practical applications and users

Who uses ISO 23223:2025:

• Ski‑boot designers and product engineers ensuring binding compatibility and safety.
• Binding manufacturers validating interface dimensions and release function with walking‑sole boots.
• Test laboratories performing conformity checks and dimensional verification.
• Certification bodies and quality managers for product marking and technical documentation.
• Retailers and service technicians assessing replacement or retrofit compatibility.

Practical benefits:

• Ensures consistent safety and predictable release behavior across walking‑sole boot models.
• Provides standardized test methods and gauges for reproducible conformity testing.
• Facilitates interoperability between boot and binding systems, reducing field failures.

Related standards

Normative references include standards used for material and test conditions, for example:

• ISO 554 (standard atmospheres for testing)
• ISO 527 series (tensile properties of plastics)
• ISO 868 / ISO 2039 (hardness and indentation tests)
• Annex C of ISO 23223 provides the test gauge for dimensional checks.

Keywords: ISO 23223:2025, alpine ski boots, improved walking soles, ski‑binding interface, test methods, marking, Mondopoint, Type A, Type C, bearing surfaces, low‑friction zone.