Original Bontrager Trek Ballista aero helmet, used very few times, always worn with a cycling cap underneath.

Sold complete with original bag and spare padding kit, still in its packaging.

One of the best aero helmets on the market for head protection, ventilation, and aerodynamic drag.

Size M, which is between 54 and 60 cm.

Excellent condition; the photos published refer exactly to the item for sale.