The Karlie cat doors Porta make life easier for outdoor cats and their owners. They consist of a frame, a hinge, and a horizontally mounted flap. The latter is pushed forward by the animal's head to pass through the opening. This allows the cat to independently and safely transition between the house and the outdoor area. A magnetic closure and a brush seal make the cat door weatherproof and draft-proof. Thanks to the locking system, it can also be controlled whether the cat can go in and out freely or if access is restricted. The mechanical cat door with a 4-way lock offers the choice between open (both in and out) and closed, as well as the options for in only and out only. The door is available in white and brown. The model specifically designed for larger cats is tailored in size to meet the needs of bigger cat breeds.