Sojoy iGelComfort 3 in 1 Foldable Gel Seat Cushion Featured with Memory Foam (A Must-Have Travel Cushion! Smart, Easy Travel Cushion) (Size: 18.5&ldquo; x 15" x 2") Ultra-soft, ultra-strong, solid rubber-like Gel and Memory material. Engineering designed for human comfort threshold, adjusting to any individual's body shape or weight. Breathable gel keeps cool while in use(a travel must have cushion!The size of the smart, easy to travel SIT MORE COMFORTABLE - Best ergonomic pillow to relieve pressure & promote circulation if you suffer from lower back pain, coccyx or sciatica pain, bruised tailbone, spinal injury, back surgery, arthritis, or other vertebrae issues. Excellent for promoting good posture. PERFECT FOR ANYPLACE YOU SIT - Office chair, kitchen, dining room, living room, patio and even your wheelchair. Great for sporting events, truck drivers, pilots, airplane travel and your car. Also provides comfort to pregnant women.