Helps restore and maintain correct posture. The gentle incline helps promote proper posture while performing daily tasks. Removable coccyx pad makes this cushion comfortable for those with tender tailbones. Precision cut foam with removable cover. Available in Blue or Black. 15” x 15½” (38cm x 39cm) with a 1” to 3¾” (2.5cm to 9.5cm) rise.