The Cirrus 4 X comfort wheelchair The Cirrus 4 X comfort wheelchair is designed for larger clients (up to 385lb) who need tilt in space, comfort and support. This durable chair is offering the qualities of the standard Cirrus 4 - for the heavy duty user. Features The comfort wheelchair is extra large with unique functions and adaptability. Cirrus 4 X is approved for high user-weight, up to 175 kg. Cirrus 4 X is reusable, cost-effective with lower servicing cost.