Very easy to use and it just inserts into a standard-sized student backpack as a school notebook or in the laptop sleeve. Byrna Shield Backpack Body Armor is a thin, weighing only  (14 oz.), flexible Level IIIA-rated ballistic plate. It can withstand up to 6 hits from .44 magnum bullets 
Made in the USA
Flexable
Light
Can stop multiple 9mm to .44 magnum bullets
Fits into any backback
Avaiable for both children and adults