Moon HY-97 Breathable Aero Cycling Helmet – 21 Vents, 231g CE Certified

Overheating on the Bike Is Costing You More Than Comfort — It Is Costing You Performance

Heat is one of the most underestimated performance limiters in cycling. When your core temperature rises beyond the optimal range, your body begins to prioritise cooling over performance — diverting blood flow from working muscles to the skin, reducing power output, and increasing the perceived effort of every pedal stroke. The result is that you slow down, you fatigue faster, and you arrive at the end of a ride feeling more depleted than the distance or the effort should justify.

The helmet you wear is a significant factor in how well your body manages heat during a ride. A poorly ventilated helmet traps warm air against your head, accelerating the rise in core temperature that triggers the performance-limiting cascade described above. A well-ventilated helmet — one with enough vents, positioned correctly, to create genuine airflow across the head — actively assists your body's cooling process, keeping your head temperature lower and your performance higher for longer.

The Moon HY-97 Breathable Aero Cycling Helmet is built around this principle. With 21 cooling vents, quick-dry padding, and an aerodynamic integrally-moulded EPS shell, it is the helmet that keeps you cool, keeps you fast, and keeps you protected through the longest and most demanding summer rides.

21 Cooling Vents — Maximum Airflow, Minimum Heat Build-Up

Twenty-one air vents is not a marketing number — it is a functional specification that reflects a genuine engineering commitment to ventilation. The vents are positioned to create a continuous airflow channel from the front of the helmet to the rear, drawing cool air in at the forehead and exhausting warm air at the back of the head. This channel effect means the air inside the helmet is constantly being replaced, preventing the heat build-up that occurs in poorly ventilated designs.

The result is a helmet that feels noticeably cooler than standard alternatives, even at moderate riding speeds. On hot summer days, in direct sunlight, during sustained climbs where your speed drops and the natural cooling effect of wind reduces — this is where the 21-vent design makes its most significant contribution to your comfort and your performance.

Quick-Dry Padding — Comfort That Lasts the Whole Ride

The quick-dry padding inside the helmet is the detail that makes the ventilation system complete. Sweat that accumulates in the padding of a standard helmet becomes a source of discomfort, odour, and — over time — hygiene issues. Quick-dry padding wicks moisture away from the skin and disperses it across the surface of the material, where it evaporates rapidly rather than accumulating. The result is padding that stays drier, feels more comfortable throughout the ride, and is significantly easier to clean and maintain.

231g — Ultralight for All-Day Comfort

At 231g, the HY-97 is among the lightest helmets in its class. This weight matters in two ways. First, it reduces the load on your neck and shoulders during long rides, preventing the fatigue that heavier helmets cause over extended time in the saddle. Second, it reduces the rotational inertia of the helmet, making it easier to hold your head in an aerodynamic position without muscular effort. For riders who spend hours in the saddle, the difference between a 231g helmet and a 350g helmet is felt in the neck and shoulders long before it is felt in the legs.

CE Certified — Safety Verified

The CE certification confirms that this helmet has been independently tested and meets European safety standards for cycling helmets. The protection it provides is real, verified, and compliant with the standards that European regulators have determined are necessary to protect cyclists in the event of an impact.

AliExpress Standard Sizing Guide (Cycling Helmets)

• S/M: Head circumference 54–57 cm
• L/XL: Head circumference 57–61 cm

Measure at the widest point of your head, approximately 2.5 cm above the eyebrows. If between sizes, size up for a more comfortable, secure fit.

Specifications

Brand: Moon
Model: HY-97
Material: EPS (Expanded Polystyrene)
Construction: Integrally-Moulded
Certification: CE
Weight: 231g
Air Vents: 21 (>20)
Padding: Quick-Dry
Type: Aero Road / MTB
Gender: Unisex Adults
High-Concern Chemicals: None
Origin: Mainland China