The Vicair Xxtra O2 wheelchair cushion offers larger sizes than other Vicair models with a user weight of up to 500kg to accommodate plus size individuals. Based on the Vicair Adjuster O2 design, it can be used to manage small pelvic obliquities by adjusting the amount of SmartCells in the adjustable compartments. Each compartment is filled with larger SmartCells (which have a lifetime warranty) for optimal skin protection. The perforated design allows the Vicair O2 cushion to be fully machine washed and facilitates air flow for moisture control.