Ordinary coccyx wedges provide an angle of between 8 to 11 degrees. Although helpful, this is not really sufficient to optimise your posture. OUR ULTIMATE COCCYX SEAT WEDGE IS THE ONLY COCCYX WEDGE AVAILABLE WITH AN ANGLE OF 22 DEGREES, MAKING IT THE PERFECT AID FOR CORRECT POSTURE AND THEREFORE PAIN AND PRESSURE RELIEF FOR THE COCCYX, LOWER BACK AND BACK! Made from high density cm foam. Several cut-outs provide greater flexibility. Ideal if you suffer from coccyx pain or soreness, lower back or general back pain. Provides perfect posture. The wedge stops you from hunching forward, straining your back and lower back. Due to the 22 degree angle, your feet will be positioned flat on the floor, which is the prelude to a perfect posture. Our seat wedge will help your spine into its natural S Shape by tilting your pelvis forward. The unique cut-out suspends your tail bone, removing pressure from a delicate and easily aggravated area. Hypo-allergenic and dust mite resistant. Ideal for asthma and other allergy sufferers. Anti-microbial and super hygienic. Does not allow organic growth to develop. Complies with BS5852. Fire Retardant. Hard wearing outer cover and waterproof inner liner. The inner water proof liner is made from high quality PU Nylon, long lasting and hard wearing for extra comfort and security. Protects the cushion from accidental spillages, other liquids, unpleasant odours and keeps it dry and clean. Ideal for incontinence problems, bladder weakness or geriatric care. The waterproof cover is easily removed. Simply wipe clean or machine wash. Outer cover is removable and machine washable. Additional outer covers and inner waterproof liners are available from ExtraComfort at Amazon. Also available without waterproof inner liner from ExtraComfort at Amazon. 14 DAYS NO QUIBBLE RETURN GUARANTEE. SHOULD YOU NOT BE HAPPY WITH TTHIS PRODUCT, SIMPLY RETURN IT TO US WITHIN 14 DAYS OF PURCHASE AND WE WILL ISSUE YOU A FULL REFUND!