Layering garment

A modular layering garment system comprising:

• a base undergarment having an interface region and a modular attachment system positioned at the interface region, the modular attachment system comprising:
• an inner flap positioned on a body-facing side of the base undergarment and secured along at least one attachment line;
• an outer flap positioned opposite the inner flap and secured along a hinge zone, wherein the inner flap and the outer flap comprise channel-forming flaps that define an insert-receiving channel therebetween;
• wherein the outer flap is movable about the hinge zone between an open configuration exposing an opening region of the insert-receiving channel, and a closed configuration wherein the outer flap overlies the inner flap to cover and at least partially enclose the insert-receiving channel;
• and
• at least one latching element disposed at an engagement region of the modular attachment system;
• an interchangeable member separable from the base undergarment and configured for releasable coupling thereto, the interchangeable member comprising:
• a visible body portion configured to extend from the modular attachment system during use;
• an insert portion configured to be removably received within the insert-receiving channel through the opening region when the outer flap is in the open configuration, the insert portion comprising opposing first and second flat sides configured to contact opposing surfaces of the inner flap and the outer flap when seated within the insert-receiving channel;
• and
• wherein the insert portion further comprises at least one engagement feature configured to cooperate with the at least one latching element to releasably couple the interchangeable member to the base undergarment;
• wherein in an assembled condition, the insert portion is seated within the insert-receiving channel, the outer flap is repositioned to the closed configuration such that the outer flap restricts access to the opening region, and the interchangeable member is releasably retained relative to the base undergarment by structural capture of the insert portion between the channel-forming flaps and latching engagement at the engagement region;
• and
• wherein the at least one engagement feature of the insert portion comprises either:
• (i) at least one corresponding latching element disposed on the insert portion and configured for direct mating engagement with the at least one latching element of the base undergarment;
• or
• (ii) at least one entry point extending through the insert portion and configured to align with the at least one latching element to permit releasable engagement through the insert portion while the insert portion remains seated within the insert-receiving channel.