The Meridian Coccyx Cushion Provides Comfort And Pressure Relief To Patients Spending Long Periods Of Time In A Wheelchair. Offering Relief Specifically For The Coccyx Area, The Cushion Is Uniquely Designed With An Opening At The Back Providing Help To Those Dealing With Sciatica, Herniated Discs, Tailbone Injuries And Other Spinal Issues. If You Feel Stiff And Sore After Sitting, Or Experience Tailbone, Coccyx Or Back Pain This Cushion Offers 3" Of Cloud-like Comfort To Those Sitting On It. Sized At 20" X 16" X 3", This Cushion Will Fit Most Standard Wheelchairs. The Cushion Has A Weight Capacity Of 225 Lbs. While Designed For Spinal Issues, This Cushion Also Helps Those Coping With Pregnancy Back Pain, Hip Pain And Hemorrhoids. Not Just For Wheelchairs, This Cushion Provides Comfort, Support And Coccyx Relief To Anyone Sitting At A Desk, Car, Or Anywhere Else For Long Periods Of Time. Large Enough To Cushion The Entire Seating Area Yet Small Enough To Remain Portable And Convenient. The Cover Of The Cushion Is A Combination Polyester-cotton Blend Thats Removable And Washable. Includes A Safety Strap To Securely Attach The Cushion To A Chair While The Inner Core Has A Liner To Protect The Foam.