Description: Purpose: Ergonomic shape, our cylinder cushion is designed to provide a comfortable support to relieve or prevent head, back, neck, and shoulder pain from poor spinal alignment. Material: Made of premium quality PU leather and sponge, soft and breathable, sustain your body while assuring the maximum level of comfort. Adjustable: This pillow includes an adjustable inserts for easy adjustment. You can easily control the height of the pillow and find the right size. Essential Tool: A professiomal postural pad and an important tool in orthopedic surgery, used to put under patients' perineum to provide support. Portable: Lightweight, easy to carry to make you relax at any places, a warm gift to the elderly or patients. Specification: Material: Sponge, PU leather Shape: Cylinder Size Chart: Small: 20x8cm/7.87x3.15inch Big: 40x10cm/15.75x3.94inch Package Includes: 1 Piece Cylinder Cushion Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!