Simpson Voyager Evolution Helmets are great for stock car, drag racing, Sprint Car, and karting use. They feature a newly designed shield pivot system and a shield latch that opens with ease. Simpson Voyager Evolution helmets have a recessed eyeport that provides a 100 percent shield seal - it's Simpson's largest eyeport, offering an excellent field of vision! These helmets are head and neck restraint compatible. Upgrades and options, such as radio communications, a rear wing, top vents, or a top cap for fresh air systems, are available.