Here's what other sites are saying:
The K2 Kids' Illusion Helmet's sweet graphics, lightweight feel, and low profile make this noggin-protector a no-brainer. The Illusion boasts In-mold construction, which molds the EPS liner directly to the polycarbonate shell for solid protection and and to keep the weight to a minimum. Your kid's dome will stay cool and dry with the Passive Channel ventilation. Get the helmet honed in for a better fit and optimum protection with the K2dialed Fit system, an ergonomically inspired three-point adjustable interface. The removable, washable liner offers full coverage and snugly cradles your head for a dialed fit. Plus, the Illusion looks so good, protection is now the cool thing to do.