This report covers the design process implemented during the development of a life jacket designed for the active sea rescuer in the Swedish Sea Rescue Society (Svenska sjöräddningssällskapet). The project's objective was to investigate the needs of the sea rescuer and then meet them with a new flexible lifejacket. It will include features that facilitate the rescue operations without reducing the safety of the user, it will have a strong identity and appealing function and design.The project aims to expand existing knowledge in product development and supplement it with experience in SAR (search and rescue) and textile design. Initially, the group took part in SAR training for better understanding and for the opportunity to study the advantages and shortcomings of today's equipment. In the process, interviews were conducted to find out the target group's views and concerns.Varied and creative methods in combination with the continuous function tests helped to develop a well thought out and functional lifejacket. Idea generation, followed by careful selection produced the final concept. Detailed design was developed on the life jacket to form the basis for pattern design. The prototype was then sewn up. Tests on the prototype secured the vest feature. Adding one more iterative design process to determine and fix smaller errors before initiating the final prototype and product.The product needs to undergo ISO rating to be sold, the ISO-class the project focuses on is the Buoyancy 50.The result is a flexible, safe and efficient real lifejacket that meets the client requirements. The vest provides innovative solutions that did not exist when the project is conducted.The contious work will now carry on with Europe's most prominent lifejacket manufacturers Baltic Safety Products, who will add the lifejacket to their range.