Order # 41304309 Manufacturer# 754130AL Brand Ultra-Wedge Manufacturer Skil-Care Application Wedge Cushion Color Black Cover Material Vinyl / Cloth Dimensions 1-1/2 X 4-1/2 X 16 X 18 Inch Material Foam / Gel UNSPSC Code 42141705 Firm foundation eliminates pressure caused by sling-seat hammocking High-density foam increases comfort and stability Fixed wedge shape prevents sliding Contoured base rests below seat frame so user sits lower in chair Low-Shear launderable outer cover reduces skin-damaging friction Water-based gel relieves interface pressure and cools to prevent skin damage caused by perspiration