When travelling on a highway or during a long journey, it is often hard to locate a toilet. This becomes a problem especially for people with needs, such as old people or people who have to use toilet frequently due to some physical reason. This design is made of waterproof breathable materials, and it can be opened from the front via the Velcro fastener. Inside, an adult diaper is connected with the trousers by a wide elastic belt. When it is time to change the diaper, it is convenient to unfasten the pants, replace the diaper and use the elastic belt to adjust the diaper back into position. The design offers a solution to situations where toilets are not easily available. The whole process of operating the design is very simple and convenient, and therefore, appropriate even for old people.