Summit: The SM01 Type II was tested against the 9mm & .357 mag. NIJ-designated rounds. The SM01 Type IIIA was tested against the .357 Sig & .44 mag. Both models are hybrid armor designs featuring Core Matrix® technology and high performance Honeywell® Gold Shield® ballistic material. Gold Shield provides enhanced ballistic performance along with improved chemical,environmental and water resistance, while Core Matrix makes the SM01 Type II and IIIA two of most flexible body armor vests available.