Dynamically crosslinked polymer networks, including vitrimers, are an exciting new class of soft materials with tuneable properties. This comprehensive book establishes the theoretical foundations for understanding and predicting the unique behaviour of these dynamic networks and their applications. Beginning with the latest developments around the Tanaka–Edwards model, chapters from leading international experts provide a complete overview, spanning modern microscopic and continuum theories, through to numerical simulations. The book concludes with the editors’ own outlook on future research directions in this rapidly evolving field. Bridging the current gap between theory and experiment, this book provides an essential reference for researchers, guiding material design and property predictions. As a gateway to the field, this book will benefit postgraduate students of polymer physics and materials science.