According to the Animal Care and Control Team (ACCT) there are about 400,000 stray or feral cats who live outdoors in Philadelphia. Even though cats are often able to find their own shelter, this may unfortunately lead them to areas that are dangerous for them or properties on which they are unwanted. Other times, there are no options that shelter them sufficiently. Moreover, their protective fur coat only insulates them as long as they do not get wet or frozen. Stray cats need warm, dry shelter to protect them and to prevent them from getting frostbite. For those reasons, I collaborated with the Stray Cat Relief Fund to build a shelter for my E90 Senior Design Project.