Winter Helmet GIRO RATIO matte black size M (55.5–59 cm)

The GIRO RATIO matte black size M (55.5–59 cm) is a winter protective helmet designed for alpine and freestyle winter sports. It offers full-coverage head protection in a neutral matte finish, with fit and thermal features suited to cold conditions. The model targets adult users whose head circumference falls within the specified range and is intended for activities where a certified winter helmet is required.

Advantages

The helmet combines a hard outer shell with impact-absorbing inner lining to reduce the force transmitted during falls. Its sizing range and internal fit system support a secure, stable fit across the specified circumference. The matte black finish provides understated visual style and resists glare, while ventilation and insulation elements balance breathability and warmth for varied winter conditions.

Suitable for

• Skiing on groomed slopes and off-piste runs
• Snowboarding and park riding
• Alpine touring, resort use and winter sports where head protection is required

When it may not be suitable

This helmet is sized for adults with head circumference between 55.5 and 59 cm; it may not fit smaller or larger users comfortably. It is designed for general winter sports protection and may not provide the specialized features required for professional competitive racing or certain industrial safety applications.

Key specifications

• Intended season: winter
• Size range: medium — fits head circumference approximately 55.5–59 cm
• Color: matte black
• Construction: hard outer shell with impact-absorbing inner liner
• Ventilation: balanced vents for airflow with thermal retention
• Fit system: adjustable internal fit mechanism for secure positioning
• Use cases: skiing, snowboarding, resort and backcountry winter activities

How to use

Place the helmet on the head so the front rim sits just above the eyebrows. Adjust the internal fit system until the helmet feels snug and stable without excessive pressure. Secure the chin strap and adjust so it fits comfortably under the chin and allows normal jaw movement. Inspect the helmet before each use for cracks, loose parts or damage; replace the helmet after any significant impact or if structural damage is visible. Follow manufacturer care instructions for cleaning and storage, and avoid exposing the helmet to solvents or high heat.

What to consider before purchase

• Measure head circumference accurately to confirm the 55.5–59 cm range fits.
• Verify the helmet meets applicable safety certifications for your intended activity.
• Consider whether you need integrated audio, goggle compatibility, or additional ventilation features.
• Plan for seasonal clothing layers that may affect fit when wearing balaclavas or thicker liners.

Usage recommendations

For best protection, ensure the helmet sits level on the head and is worn during all downhill runs and park features. Combine with properly fitted goggles and adjust venting to match activity intensity and outside temperature.