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 flap is pushed forward by the cat's head, allowing it to pass through the opening. This enables the cat to move independently and safely between the house and the outside area. A magnetic closure and a brush seal make the cat door weatherproof and draft-proof. Additionally, the locking system allows control over whether the cat can go in and out freely or if access is restricted. The mechanical cat door with a 4-way lock offers options for open (both in and out) and closed, as well as the options for only in or only out. The door is available in white and brown.