A kinetic barrier uses mass effect technology to create a force field that repels or deflects objects that enter the field and dangerous speeds. Basic barriers simply "push back" against the projectile, slowing it to a harmless speed or pushing it away. Advanced "cyclonic" barriers apply lateral force to projectiles, deflecting them so they miss the target.
Barrier technology is only effective against physical projectiles; barriers provide virtually no protection against directed-energy weapons.
Like all mass effect technology, barrier technology is scalable. Barrier generators can be installed in everything from dreadnought-class starships to personal body armor. Barriers can even be created by individuals with biotic abilities.