A helmet system has a restraint feature for deterring neck injuries that includes a helmet having an attachment member at the rear of the helmet and a tether coupled to the attachment member at the rear of the helmet. The tether couples the helmet to a part of the body of a user in order to limit movement of the helmet. A safety feature for use with a helmet in order to deter neck injuries includes a tether having a first connector at one end for fixedly mating with a helmet and a second connector at the other end for mating with a part of a body of a user. The tether is positionable in the rear neck area of a user.