A1001BK Size: Small, Color: Black Pictured in black Features: -Designed to relieve and help prevent lower back pain. -Tapered angle of the wedges encourage correct posture. -Available sacro versions with coccyx (tailbone) cut-out to reduce spinal pressure. -Provides proper sitting posture. -Covered with a washable, durable twill fabric. -Available in 2 sizes: Large and Small. -Available in several colors: Black, Gray and Navy. -Made of high quality polyurethane foam. -Dimensions: 10-17" H x 16" W x 2-2.5" D.