For kind of outdoor swimming pool is required a protective when not used, this is one of the act of maintenance at pool. To cleanliness and beauty of pool then required a protector. In outdoor swimming pool, in terms of maintenance is very required a special attention, because relating to open space. On the type of this pool is usually often windblown, so many the foliage garbage which will fall to the pool. This thing cause to pool will look dirty and ugly, moreover on the type of tropical style pool. In the tropical style pool there are many plants or big trees in the around pool, so that foliage garbage of course would be a lot fall, so that required repeatedly cleaning. For settle this matter the installation of the protector are main alternative, for example is winter swimming pool cover. The winter swimming pool cover installed on the surface of the swimming pool. Kind of these protector will cover all the surface of the swimming pool, so if there are the foliage garbage fall so will fall no directly to the surface of water in the pool. Material used to protected the pool this type are solid vinyl, mesh, tarpaulin, nylon, and and rubber. Both outdoor In-ground pool or outdoor above ground pool, all need protector for keep pool that always clean. The act of like we have explained above is one of care pool from impurities, especially impurity of the foliage. Here we presenting the examples of winter swimming pool cover design, both for in-ground and above ground style pool.