One of the biggest changes is the D3O protection. At the gear intro, Klim explained it had an independent lab conduct tests on all the available armor options and D3O still performed the best. But it wasn't just off-the-shelf D3O pieces—Klim worked with D3O directly to create the Klim D3O Aero Pro armor pieces. What makes this armor different is that it still passes CE Level 2 testing while ventilating five times better, with 44 percent more coverage, than D3O's past armor pieces. Pretty impressive.