I have tried so many different pressure cushions for a tail bone pressure sore and nothing worked in a recliner chair until I found this one. This is perfect - ultra thin (3.5cm) so doesn't tip me out of the chair; is continuous from head to foot and anchored to the chair so doesn't slip and slide. Designed so that it is extremely comfortable for someone who has to sit in their chair for most of the day. Personally I totally recommend it - and it is very affordable as well. affordable