Bike Helmet GIRO SOURCE MIPS — matte white, size M (55–59 cm)

GIRO SOURCE MIPS — matte white, size M (55–59 cm) is a mountain bike helmet engineered for trail and cross-country riding. It integrates a multi-impact shell design with MIPS rotational protection to reduce rotational forces during oblique impacts. The helmet includes a ventilation layout, adjustable fit system and extended rear coverage typical for off-road use, offering a balance of impact mitigation, comfort and fit for everyday mountain and gravel cycling.

Advantages

The helmet combines MIPS rotational protection with a lightweight yet durable shell and energy-absorbing liner to address linear and rotational impact forces. An adjustable retention system allows precise fit for head circumferences within the M size range, while the matte white finish provides a neutral appearance that is easy to maintain. Integrated vents and internal channeling support airflow to help manage heat on longer rides.

Suitable for

• Trail and enduro-style mountain biking where extended rear coverage is beneficial
• Cross-country and gravel rides requiring ventilation and low weight
• Everyday off-road training and recreational cycling
• Riders seeking MIPS rotational protection in a medium-sized helmet

When it may not be suitable

This helmet is designed for mountain and cross-country applications; it may not be the best choice for downhill racing where additional face protection or a full-face helmet is required. It is sized for head circumferences of 55–59 cm, so riders outside that range will need a different size. The matte white finish, while practical, shows dirt and scuffs more readily than darker colors.

Key specifications

• Intended use: mountain bike / cross-country
• Safety system: MIPS rotational protection integrated into helmet construction
• Shell: lightweight, impact-resistant outer shell with energy-absorbing liner
• Fit range: medium size suitable for 55–59 cm head circumference
• Ventilation: multiple vents with internal channeling for airflow
• Finish: matte white
• Retention: adjustable rear fit system and chin strap with buckle

How to use

Place the helmet on the head so that it sits level and covers the forehead without tipping backward. Adjust the rear retention dial or fit mechanism until the helmet is snug but comfortable. Fasten and adjust the chin strap so it forms a V just below each ear and the buckle sits centered under the chin; the strap should be tight enough that the helmet does not move excessively but loose enough for comfortable breathing and talking. Replace the helmet after any significant impact or if the liner or shell shows visible damage.

What to consider before purchase

• Measure your head circumference to confirm it falls within the 55–59 cm range for size M
• Decide if MIPS rotational protection and extended rear coverage meet your riding discipline requirements
• Consider helmet color and maintenance — matte white is more prone to visible dirt and marks
• Check compatibility with any eyewear, communications or camera mounts you plan to use

Usage recommendations

For best protection and comfort, ensure the helmet is correctly fitted before every ride, keep vents free of debris, and replace the helmet after a significant crash or if structural damage is present. Periodically inspect straps, buckles and the fit system for wear and proper function.