In this graduation report, the graduation project ‘Equipment for Sitting Volleyball Players’ for NeVoBo (the Dutch volleyball organisation) is documented. The assignment for this project is: ‘Design and test equipment for sitting volleyball players to improve their performance.’ The execution of the project is done with a user-centered design process. In this user-centered design process, methods like observation, context mapping, prototyping and user testing are used. In the analysis phase, a decision has been made about how the graduation project will evolve. The most important part of the equipment to improve first, are the pants and shoes with a focus to make it possible for the sitting volleyball player to slide better and the wish to make them more comfortable. This is combined in the interaction vision: ‘Enjoy a match as sliding a slide on a playground’ To realise this vision, there are boundaries set and a list of requirements is made. With this list of requirements and wishes, the generated ideas, and later on concepts, can be judged. During the concept phase, due to limitation of time, the focus will go to the pants for the new equipment, which will be worked out into complete prototypes. The development of new shoes will stay in an ideation phase and a rapid prototype of them will be used during the testing of the prototypes of new pants. In the synthesis phase, four design cycles were done. The first cycle was an orientation on what the sliding capabilities were of currently available pants and shoes. In the second cycle, more research was done to the sliding coefficient of the materials and a pair of climbing shoes was chosen to use during prototype tests, because of its good grip. With this information, in the third cycle, a pair of shorts, trousers and shorts with braces were made, which did not seem to have significant differences in speed. In the last and fourth cycle, the problem of sweat regulation and the problem of sharp orthesis were looked at. As final concept, a tight fitting design, made of Lycra, was chosen, with pieces of better absorbing stretch cotton in the pattern. This choice was based on sliding coefficient tests, the sliding speeds of the prototypes and the feedback of the players, after they tested a prototype during these design cycles. In the detailing phase, there is chosen for the ‘Bora’ Lycra of Wegal for the sliding zone and the Staco Medical fabric ST014, a sort of stretch cotton, for the absorbing pieces. With the pattern, where the players choose if they like to have shorts or trousers, prototypes are made with an individual tight fit. The fabric is sewed together with a lock stitch and a flatlock stitch, the top is finished with an elastic band with integrated cord and the end of the legs is hemmed with a double stitch. Protection garment is designed for the knee, a brace around the knee, a brace around the ankle and for a stump. This protection is filled with coldfoam of 12 or 17 millimetres thick and made of an outer layer of ‘Bora’ Lycra and an inner layer of the stretch cotton. The protection is finished with an anti-slip elastic band at the top and a hem at the bottom. The final prototypes were evaluated in a user test, in which can be concluded that another requirement for the fabric is that the fabric does not have a nap, which was not observed earlier. Also, the pattern of the pants should be optimised to be a bit tighter to prevent chafe markings and not be too high at the belly but still be high enough at the back. The protection garment should be tightened a bit at the top and the bottom and could be further designed with a research to the possibilities of the foam to optimise this protection garment. It is recommended that for this optimisation phase, there is cooperation with a production company specialised in producing Lycra sport clothing. This company will have more knowledge about making tight fitting patterns for individual athletes and access to a broader range of textiles. The process of this project went well with the use of the user centred design process. The design cycles with prototyping and testing were very valuable. The opportunity to use the team in this was very important. It was possible to bring this graduation project to a satisfying end within the tight time frame and with the available knowledge.