Invacare Matrx Vi cushions provide excellent pressure reduction, comfort and positioning designed for users at moderate to high risk of skin breakdown. FeaturesAnatomically designed molded Visco-elastic/HR foam combination includes pre-ischial contour, trochanteric shelf, beveled front-endMoisture resistant, zippered inner cover protects foam and allows easy access for cushion modificationMoisture resistant/breathable outer cover available in black or appealing Kid*ab*ra fabricOptional Pelvic Obliquity Kit/ Leg Length Discrepancy/Seat Depth ReductionLightweight, maintenance freeSpecificationsSeat Width 14 , 16 , 17 , 18 Back Height 15 Thickness 2 Product Weight 4 lbsProduct Weight Capacity 300 lbs Standard ; 600 lbs Heavy Duty Warranty 2 years 1 Each / Each