Jay Easy Cushion 16 W x 18 D Flat Base Flat Base * Includes a Lightweight pre-contoured foam base (flat or curved) with Jay Flow FluidTM pad and an incontinence-resistant cover * Provides a stable base for the client who has symmetrical posture needing moderate postural support * Built-in medial and lateral thigh support promotes optimal thigh positioning * Curved base version counteracts the negative effects associated with sling upholstery providing a level sitting surface * Flat base version is for use with a seat pan or with the optional solid seat insert to provide extra postural stability while discouraging the cushion from slinging with the chair upholstery