Premier Body Armor
A 10x15 soft backpack panel made from a para-aramid ballistic package inside waterproof ripstop and a 500D Cordura shell. Premier states it is tested to Level IIIA; this is handgun-threat armor and does not stop rifle rounds.

Premier's 10x15 panel is the thin soft-armor baseline for an everyday backpack. The ballistic package uses para-aramid fibers, a waterproof ripstop seal, and a 500D Cordura outer layer. At 1.4 pounds and 0.22 inch thick, it adds less weight and bulk than either rifle-rated insert in this group.
The protection ceiling is explicit: Premier says the panel is tested to meet Level IIIA ballistic standards. That is soft handgun-threat armor, not rifle armor. The product page also states that it is not formally tested or rated to the NIJ stab-resistance standard, so the ballistic rating should not be treated as a stab rating. Measure the bag's laptop sleeve or main compartment before buying; Premier recommends matching the compartment's width and height to the insert dimensions.
Add the 10x15 Level IIIA Backpack Insert to your build and see how it enhances your platform.