Roho Hybrid Elite Cushion Single Valve 18 x18 x4.25 Bath Shower Chair Accessories allowing you to recognize and 48750 allowing you to recognize and boost speech over background noise and manually adjust the volume depending on the environment you're in very simper to use Combines the suberb skin protection and shape matching ability of ROHO DRY FLOATATION© with the stability of Jay© base technology * This new cushion design allows for improved position and function while maintaining optimal immersion and envelopment of both the ischial tuberosities and greater trochanters * Cushion insert matches the individual s shape by adjusting the amount of air * Air cushion insert is easily cleaned with soap and water Cover with encased comfort foam is machine washable