I highly recommend this sofa cushions unreservedly. It is very well made, agree that mass and it feels very soft, while offering enough support. The content consists of duck and goose feathers, unfortunately is not specified whether these were collected by live-plucking. The reference is marked with an Oeko-Tex Standard 100 label (pollutant free textiles). The seams are clean, no protruding springs. I am very happy with the pillows.