This more open approach to innovation, however, is not without transaction costs (e.g. sourcing and processing of new knowledge) and even financial costs (e.g. purchasing of knowledge). Quilts of Denmark collaborated with NASA in order to optimise in-house innovation. The quilts made by Quilts of Denmark are based on knowledge provided by sleep researchers who tell Quilts of Denmark about the real needs for quilts, e.g. temperature regulation in relation to insomnia. Quilts of Denmark worked on a technology for regulating the temperature in quilts but it was not completely successful.