Black period underwear with cotton crotch and absorbent layers

The product is centered against a clean white background with a detailed cross-section diagram on the left showing its four-layer construction. Even lighting emphasizes the garment's coverage and the technical features of its absorbent design.

This exact Nicsy 04-layer brief photographed alongside the cross-section diagram showing cotton crotch, absorbent layer, and waterproof layer, white background, even clinical lighting, educational style emphasizing technology and quality.