Wheelchair Cushion Foam Gel 18X16X3 E & J Duragel Base 3 Bags The Patient Pack includes specially Interdepartmental Envelopes The Patient Pack includes specially designed envelopes to facilitate mailing to the physician and or laboratory Xeroform 4x4 ST Features a comfortable convoluted foam topper with a high density base foam Features a specialized Dura Gel™ center layer surrounded by comfortable foam layers on the top and bottom of the cushion The cover has a four way stretch top with a no slip base fabric and has a strap at the back to secure the cushion firmly to the chair Accommodates a wide range of body shapes The cushion uses a high density base foam for durability in combination with a convoluted topper for comfort and airflow