• 【 Bike Adult 】light integrated bike with visor crash hat for Lightweight breathable, anti, high-density and comfortable.
• 【 Material 】 Made of high-density EPS foam shell with in construction provide full protection for your head.
• 【 Adjustable Dial 】 easy to use adjustable makes head circumference under 65cm/25.6 inches, Head Width below 18cm/7.08inch.
• 【 Enough Ventilation】 21 Vents keep enough ventilation to keep you cool and reducing wind resistance.
• 【 Lightweight 】 light (only ) won' burden to your head after long time wearing.

1 Piece Bike