Convoluted Coccyx Cushion 1321 by Allman Products $0.00 3" x 16" x 18" / Foam - $0.00 3.5" x 16" x 18" / Gel & Foam - $0.00 3" x 16" x 18" 3.5" x 16" x 18" Size Foam Gel & Foam Type 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Convoluted foam allows for more air circulation Relieves pressure on tailbone / coccyx area Provides excellent comfort & support Comes with removable / washable cover Available with gel