Second Nature is a smart and simple subscription service for home air filters and fridge filters. All you do is choose the sizes and type of filters for your home, then tell us how often you want them delivered. We ship your filters directly to your door on the date they need to be replaced. When they arrive, all you have to do is pop those in and discard the old ones! Voila! Our filters are the same quality or better than you’ll find at your local hardware store, often at a lower price!