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We explore the characteristics of spherical bags made of large numbers of BPSmagnetic monopoles. There are two extreme limits. In the Abelian bag, $N$ zerosof the Higgs field are arranged in a quasiregular lattice on a sphere of radius$R_{\rm cr} \sim N/v$, where $v$ is the Higgs vacuum expectation value. Themassive gauge fields of the theory are largely confined to a thin shell at thisradius that separates an interior with almost vanishing magnetic and Higgsfields from an exterior region with long-range Coulomb magnetic and Higgsfields. In the other limiting case, which we term a non-Abelian bag, the $N$zeros of the Higgs field are all the origin, but there is again a thin shell ofradius $R_{\rm cr}$. In this case the region enclosed by this shell can beviewed as a large monopole core, with small Higgs field but nontrivial massiveand massless gauge fields.

BPS Magnetic Monopole Bags