The topic of this doctoral research is the concept of product attachment for ordinary consumer durables. Product attachment is defined as the strength of the emotional bond a consumer experiences with a specific product. Specifically, the research investigated how this bond develops over time and the relationship between product attachment and product lifetime. In addition, we studied which determinants may affect the strength of the emotional bond with products and uncovered the role of the product and its design for bringing about these determinants of product attachment. Based on this knowledge, several design strategies are proposed that designers may use for stimulating the degree of attachment to a product.