This moderately priced Adult road bike helmet from Trek is rated excellent for impact absorption, excellent for ease of use and very good for ventilation. The many adjustment features translate to a excellent rating for fit adjustment. The length of the strap for the retention system can be adjusted, and it's considered easy to adjust. This helmet comes in 5 sizes. The weight is on the lighter side and among those we've tested is considered better. This helmet has the following notable features: reflective aspects for greater visibility in low light, technology to limit the effects of rotational impacts and a crash replacement program is also available in case you damage your helmet in an accident within the first year of ownership. It comes with a one year warranty.