Seat cushion with coccyx cut out to provide air cushioning to the tail bone, top corrugated sheet distribute pressure equally at buttocks, manages body heat, and conforms body shape
Sitting mass, and stability to cushion are provided by closed-cell high-density PU foam beneath a corrugated gel sheet, encapsulated in incontinent-proof and breathable extension fabric (wicks away moisture and heat)
If your pelvic structure or prolonged sitting seat is flat, flat type is advisable
Top gel layer:   18 mm gel layer (optional: in blue and green color)
Color of Fabric Cover: Black 
Generic Name of Product: Coccyx Seat Cushion or Tail bone injury Cushion
Available in standard size(s): Flat Corrugated Standard (16" X 16" X 2.5" X 2.5")
Indications:  (a) Designed exclusively for coccyx pain relief; (b) Pipe type configuration (corrugation) allows continuous flow of air and thereby anti-sweating
Used for daily siting in home, offices and even during driving cars if suffered from coccyx pain.