Light: Helmets with low weight (up to 300 grams) for comfort on long distances and reduced neck fatigue.
Medium: Medium-weight helmets (300-450 grams) for a balance between comfort and protection. Suitable for everyday use and city/leisure cycling.
Heavy: Helmets weighing over 450 grams with a sturdier construction or additional features that offer increased protection, usually for MTB or more demanding use.