Varilite Zoid PSV Wheelchair Cushion - E2622 The VARILITE Zoid PSV is the low-profile cushion of choice for active wheelchair users at moderate risk of tissue breakdown. Therapists recommend the Zoid PSV for individuals who need a low profile, tapered cushion without a medial thigh separator. Athletes value its lightweight design and vibration impact dampening. On the court. On the track. On the trail. VARILITE Air-Foam Floatation, coupled with multi-stiffness foam, delivers superior pressure distribution. Functional areas of the Zoid PSV are created by three types of foam: soft foam for the decubitus-sensitive area of the Its; medium foam for the thigh trough and pelvic bucketing; and firm foam for the perimeter. The PSV takes the guesswork out of cushion adjustment. It releases air to immerse the user in the foam, which conforms to the user and distributes the user's weight over the surface of the cushion. When the PSV senses that enough air has been released, it automatically shuts off the flow of air for optimal pressure distribution.