Even with its aerodynamic racing shape, the TT28 StarStream's vent channels are designed to move air across the head to help manage heat buildup, which matters during intense efforts in India's warm climate. Riders using it for racing or fast group rides will notice the airflow helps keep fatigue and overheating in check over longer efforts.

Sunrimoon's TT-series helmets, including the TT28 StarStream, are built to stay competitively light for their aero shell size, with a rear dial adjustment system that lets you fine-tune tightness quickly before a race start. This makes it easy to get a locked-in fit without fiddling mid-ride.

Measure your head circumference just above the eyebrows and compare it against Sunrimoon's standard adult size chart to choose between available sizes for the TT28 StarStream. The rear adjustment dial then lets you fine-tune the fit for a snug, race-ready feel.

Yes, the 'TT' naming and grille-style shark-tooth design of the StarStream point to a Racing Series helmet engineered for aerodynamic advantage, aimed at riders chasing competitive gains rather than casual commuting. It is a good pick for time-trial efforts, criteriums, and fast group rides where every second counts.

Wipe the shell down with a soft, damp cloth after dusty or sweaty rides, and remove the interior padding periodically for a hand-wash to keep sweat and odor from building up, particularly important in India's heat. Let it air-dry fully before storing to protect the EPS liner from trapped moisture.

Yes, every TT28 StarStream sold on DoGoodCo is a genuine, officially sourced Sunrimoon Racing Series helmet, covered by standard manufacturer warranty against manufacturing defects. Reach out to our support team if you spot any issue with the shell or fit system after delivery.

Orders typically dispatch within 3 working days of confirmation, with total delivery time depending on your pin code and location across India. DoGoodCo operates as a prepaid-only store, so cash on delivery is not offered, and payment is completed at checkout.