The primary aim of this study is to compare the effectiveness of the turn and position system (Prevalon®Turn and Position System 2.0, SAGE) versus standard care to improve reposition frequence in patients at risk. The second aim is to compare the effectiveness of a tailored protocol versus standard care to improve reposition frequence in patients at risk. The third aim is to compare the effectiveness of standardized incontinence care versus standard care to improve the incidence of pressure ulcers and incontinence-associated dermatitis (IAD). Also a health economic evaluation will be performed.