The 11 Degree Wedge has been designed to improve seating posture & is especially popular for use in cars. Placed in any chair, the wedge adapts the angle of the sitting position, tilting the pelvis forward; encouraging good posture. Recommended by chiropractors. Product features: High density foam Cover included (zipped & washable) in black, blue, grey & beige Made in Devon, UK 2 year guarantee Light weight to carry & travel with Can be used in any chair i.e wheelchair, car, sofa, office Helps heal and comfort: Improved posture Pelvic & hip support Arthritic pain Sciatica Back/ spinal injury Scoliosis, osteoporosis & more Cover: The fitted cover is zipped and washable and includes a built in carrying handle. The wedge also comes with an adjustable (and removable) fixing strap to hold it in place. Size: Standard: 36cm x 36cm x 9.5cm (14" x 14" x 3¾") Wide: 36cm x 46cm x 9.5cm (14" x 18" x 3¾") 11 Degree also available with a coccyx cut out.