<scp>3D</scp> ‐Printed Hydrophobic Mesh Surface for High‐Performance Unidirectional Liquid Transport and Surface Dryness

ABSTRACT Rapid unidirectional liquid transport and persistent surface dryness are critical for advanced sanitary products. Traditional sanitary products utilizing hydrophilic nonwovens often suffer from moisture retention. Herein, we report a novel three‐tier composite architecture diaper comprising a 3D‐printed hydrophobic mesh surface (HMS), a superabsorbent core, and a breathable hydrophobic back layer. The 3D‐printed HMS utilizes a tailored pore hierarchy to facilitate immediate fluid penetration via gravitational and capillary forces and prohibit the backflow with its intrinsic hydrophobic barriers. Furthermore, compared with conventional diapers, the HMS diaper showed a 200‐fold enhancement in breathability and a 50‐fold improvement in surface dryness. By effectively reducing skin‐interface liquid retention and increasing vapor permeability, the HMS diaper established an advanced solution for next‐generation, high‐efficiency fluid‐managing textiles.