Fits 16 - 21 Wide Wheelchairs; 16 High Perfect Solution For Patients With Mild Positioning Needs Versatile Back Support System That Improves Patient Comfort And Posture 1 Thick High Density Foam Pad Provides Optimal Pressure Redistribution Secures Directly Over Wheelchair Canes For Added Strength Stability And Safety 5 Adjustment Straps Featured For Multi-purpose Back Support And Customization To Individual Seating Needs Handy Back Pocket Is Convenient For Carrying Keys Water Bottle Medications Tissues And More Breathable Cover Is Fluid Resistant And Easy To Clean And Maintain Cushion Folds With The Wheelchair For Easy Transport And Storage Meets Flammability Standard Tb117 Weight Capacity 350 Lbs Warranty 18 Months