Icon D30 Back Protector. Thin, flexible armor insert for your favorite Icon jacket. D3O molecular armor has your back on impact by reacting to and dissipating force. An advanced, patented polymer, CE-rated D3O impact protectors are the latest advancement in protective armor. D3O® impact protectors utilize intelligent molecules that lock together on impact. Because of this, the impact protector can be made thinner and lighter, making a jacket more comfortable and easier to wear. However, this decreased size does not come at the expense of impact protection.