The first case of an adult multi-level leak-proof underwear is that a cleaning portion is sewn between the front and the back of a perineal portion of a pants body, and the cleaning portion is formed by laminating a plurality of layers of functional materials, which is From the inside out, it includes a moisture-absorbing and quick-drying cloth, a terry cloth, a water-repellent water-repellent cloth, and a burr-like cloth. The sutures are evenly and tightly wound on the trousers. First, the urine is quickly passed through the moisture-absorbing and quick-drying cloth. Absorbed and spread to the next layer, so that the surface is always dry, and then the urine is locked by the towel cloth to keep the wearer's skin dry and comfortable, and then prevent the urine from seeping out through the anti-seepage water cloth. To the inner body of the underwear, the outermost layer is a needle-punched rib fabric with antibacterial and deodorizing treatment, which has the effects of deodorizing, bacteriostatic and breathable, so that the cleaning department of the underwear can maintain the pants even after absorbing urine. The dry and breathable and not easy to breed bacteria, so that the skin around the perineal area of the wearer is not prone to flush red eczema.一種成人多層次防漏內褲第一案，是一褲體的會陰部前後之間縫設一保潔部，而該保潔部是由多層的具功能性的材料所疊合車縫而成，其是由內而外包括一吸濕快乾布、一毛巾布、一防滲潑水布、以及一抽針羅紋布依序在褲體上均勻緊緻無痕的縫合，首先透過吸濕快乾布讓尿液快速吸收通過而擴散到下一層，使其表面始終保持乾爽，再藉由毛巾布吸收鎖住尿液，使穿著者皮膚接觸時能保持乾爽舒適外，並再透過防滲潑水布防止尿液滲出外流至內褲本體，最外層則是具抑菌消臭後處理的抽針羅紋布，具消臭、抑菌及透氣的效果，故令內褲的保潔部即使在吸收尿液後，仍能保持褲內的乾爽透氣與不易讓細菌滋生，達到讓穿著者會陰部周圍處的皮膚不易發生潮紅濕疹的問題。
