The Entity RH15 Road bike is a lightweight, aerodynamic and super comfortable helmet made for fast-paced road cycling whether you're cutting lines through traffic or the peloton. Exceeds Australian Helmet Standards - the toughest in the world Ultra-lightweight design Dual In-Mold construction with a sleek, low profile fit that provides incredible strength, resilience and aggressive style 17 strategically placed vents maximise airflow and further enhance aerodynamics Comfortable and anti-bacterial washable pads absorb excess moisture Dial fit system provides easy one-handed adjustment Approvals EN1078 / AS/NZ2063:2008 Sizes - Medium (Head Diameter 56-58cm), Large (Head Diameter 58-61cm)