The Particle's ability to warp mass and size can transport said mass, and also objects and living beings, into what is known as the Quantum Realm, a subatomic dimension of space that holds any mass of those who have shrunken with the use of the Particles. The mass, while still part of the shrunken subject, is shunted inside the Quantum Realm until returned. As the blue Pym Particle Discs have demonstrated, mass can be added onto a subject of the Particles and allow the subject to increase their size rather than shrink it.