Abstract: An improved retention mechanism for a bicycle helmet is provided. A helmet including a retention mechanism comprises a shell for protecting a head of a person and a fit system elastically coupled to the shell. The fit system comprises a bowl designed to fit an occipital region of the person's head and a hinge for coupling the fit system to the shell, the hinge permitting the fit system to move. The fit system further including a spring element for positioning the bowl against the occipital region of the person's head, to stabilize the helmet against the person's head.

Abstract: The invention relates to a protective bicycling helmet with a rear support structure having at least two generally vertical columns mounted in the rear portion of the helmet body for providing improved ventilation while retaining or improving the rigid structural integrity of the helmet.

Abstract: The invention relates to a protective bicycling helmet with a retention system having a rear support member for providing a more comfortable and secure fit on a user's head for greater protection and safety. One embodiment of the helmet has a rear stabilizer mounted at its first end to the rear portion of a helmet body. The other elements of the helmet retention system engage the front portion of the helmet body and engage the second end of the rear stabilizer. The rear stabilizer is shaped to conform to the back of the user's head and extends down from the helmet body such that the helmet retention system engages the nape of the neck of the user.