When the frame is beautifully built and the design carefully considered and constructed, we move onto cushion fillings and springs. The cushion density has to suit the character of that particular chair. We use a combination of foam, fibre, duck feathers and down (for extra loftiness), because none of them are quite sufficient on their own. You want to sink into your sofa, but you don’t want to feel like you need to be constantly plumping. Sofa cushions need to bring together comfort, shape and rebound. Each chair is designed with a different filling ratio. Consider George, a sleek, architectural sofa whose cushions need to be less-domed, unlike Eva whose classic shape very much requires a pillowy silhouette. As for the springs, we favour the more modern alternative to the coil spring: serpentine springs. They’re wonderful because they don’t sag, but most manufacturers avoid them as they can damage the frame. Our solid timber frames mean that we’re able to use the best possible springs for the job. Some sofas use pocket springs (most commonly used for mattresses because of their ability to evenly distribute weight) but we find serpentine to be far comfier, far more practical and they can play the long game. And we should know – we test every one of our armchairs and sofas in our own homes. We give them all that we’ve got, to see just how much they can take. John has had the Eva sofa in his family home from the moment it was first made. We let our product testing span years, so we can watch how our designs mature, and how we can help them to be at their best for as long as possible.