The Giro Revel helmet has a safe style and superior ventilation combined with a striking design that fits any ride, both sporting, urban and recreational. It includes important features such as the In-Mold construction and a comfortable adjustment system such as the Acu Dial.Features:- Acu Dial adjustment system- In-mold construction with EPS structure for impact absorption- 22 ventilation openings- Full coverage shell- Reflective areas on the back- Visor with reinforcements in the anchor points- Size: Universal Fit Adult (54-61 cm)Giro Technologies:- Acu DialThe Acu Dial system allows a perfect fit, fast and can be done with just one hand. The adjustment is made by a large ergonomic dial on the back of the helmet that tightens the fastening tape. This system is available in helmets with Universal Fit system. Ponytail compatible.- In-MoldThe Giro in-mold construction process fuses the outer casing of the helmet with the impact absorbing EPS envelope during moulding.