Abstract: A head and neck support device for a user of a vehicle with a safety harness over the shoulders of the user and a helmet on a head of the user is provided having a collar and a plurality of tethers. The helmet is configured to interact with the collar or the shoulder of the user to limit rotation of the head of the user. Lateral motions and associated forces on the user's head and spine are reduced by the transfer of associated forces to the user's body through the plurality of tethers and the interaction between the helmet and the collar or shoulder of the user.

Abstract: A shackle is provided that is fixedly mounted to a surface. The shackle can have a body, a hasp, and a locking pin. The body can define at least one mounting bore that is configured for mounting the shackle to the surface. The proximal end of the hasp is configured to rotate relative to the body and the distal end of the hasp is configured to selectively engage the locking pin, such that an enclosed area is defined. A tethering device can be attached to the shackle via cooperative engagement with the selectively enclosed area.

Abstract: A head and neck support device for an occupant of a vehicle with a shoulder harness over the shoulders of the occupant and a helmet on a head of the occupant. The head and neck support device having a yoke, a tether, and at least one sleeve member, which has a cavity defined therethrough. The tether is configured to slide through the sleeve member cavity for a defined distance, which allows the occupant a greater range of side-to-side rotary head mobility.