A neck collar interfacing with a lower edge of a helmet of a wearer. The collar includes a pad and a shell. The pad is formed of a closed-cell foam material and forms a loop to be secured about the neck of the wearer. A plurality of shell components are secured to portions of the upper face of the pad. The shell is more rigid than the pad to spread the energy of impact with a lower edge of the helmet over a larger region of the pad. The shell and pad each include a chest portion having a split for opening the pad for putting the collar on and taking it off. The shell components are discontinuous at at least one lateral portion of the pad to allow flexibility of the pad for separation of the pad at the split.
