Pelvic-positioning straps are usually used to maintain the client/seating system interface. This article discusses the proper use of these straps. Proper selection and use of a pelvic-positioning strap will affect the success of the entire seating system, so careful attention must be paid to the size of the strap(s) and components and the placement of the strap as it crosses over the client's thigh/lower pelvic area. The direction of pull as the fastening system is closed and tightened may affect pelvic position as well. The author suggests the use of belts mounted to cross the upper thigh at a 90° angle to the seating surface. Placing the pelvic positioning strap at this angle leaves the pelvis free for active anterior movement during weight shift and functional reaching. Adjustable mounting hardware is recommended as a method of providing a pelvic-positioning system that is flexible enough to achieve proper alignment.