A lower-body garment that has built-in leak protection. The built-in leak protection can be achieved through an integral gusset or an internal assembly that is positioned interior to an exterior layer that forms the lower-body garment. The internal assembly can include a front torso portion, a back torso portion, and a crotch portion. The crotch portion can include a spacer fabric layer configured to be positioned adjacent to a wearer’s body surface, and a moisture-barrier layer secured to the spacer fabric layer and configured to be face outward.