Boltless Helmet Suspension Systems: With the four-point retention, either with pads or the R2S™ ratchet, the system maintains the helmet’s ballistic integrity by eliminating bolt holes and provides greater comfort with more adjustment options. The new Boltless Helmet Suspension System is available on the Delta™ 4 line of helmets which is available in Black, Tactical Green, Coyote brown or Foliage Green with an MSRP of $675.00.